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Encyclopedia > 4 (number)
4

0 1 2 3 4 5 6 7 8 9 Zero redirects here. ... One redirects here. ... For other uses of 2, see 2 (disambiguation). ... This article is about the number. ... Look up five in Wiktionary, the free dictionary. ... Look up six in Wiktionary, the free dictionary. ... Seven Days of Creation - 1765 book, title page 7 (seven) is the natural number following 6 and preceding 8. ... Look up eight in Wiktionary, the free dictionary. ... This article is about the number. ... This article is about the number 10. ...

List of numbersIntegers This is a list of articles about numbers (not about numerals). ... Not to be confused with Natural number. ...

0 10 20 30 40 50 60 70 80 90 Zero redirects here. ... This article is about the number 10. ... 20 (twenty) is the natural number following 19 and preceding 21. ... 30 (thirty) is the natural number following 29 and preceding 31. ... 40 (forty) is the natural number following 39 and preceding 41. ... 50 (fifty) is the number following 49 and preceding 51. ... 60 (sixty) is the natural number following 59 and preceding 61. ... Look up seventy in Wiktionary, the free dictionary. ... 80 (eighty) is the natural number following 79 and preceding 81. ... 90 (ninety) is the natural number preceded by 89 and followed by 91. ... 100 (one hundred) (the Roman numeral is C for centum) is the natural number following 99 and preceding 101. ...

Cardinal 4
four
Ordinal 4th
fourth
Numeral system quaternary
Factorization 22
Divisors 1, 2, 4
Roman numeral IV or IIII
Roman numeral (Unicode) Ⅳ, ⅳ
Arabic ٤
Arabic (Urdu) ۴
Ge'ez
Bengali
Chinese numeral 四,亖,肆
Devanagari
Hebrew ארבע (Arba, pronounced are-buh) or ד (Dalet, 4th letter of the Hebrew alphabet)
Khmer
Thai
prefixes tetra- (from Greek)

quadri-/quadr- (from Latin) Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are generalized numbers used to measure the cardinality (size) of sets. ... In linguistics, ordinal numbers are the words representing the rank of a number with respect to some order, in particular chronological order or position: first, second, third, etc. ... This article is about different methods of expressing numbers with symbols. ... Quaternary is the base four numeral system. ... ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... Arabic redirects here. ... Urdu ( , , trans. ... Note: This article contains special characters. ... Bangla redirects here. ... Today, speakers of Chinese use three numeral systems: There is the ubiquitous system of Arabic digits and two ancient Chinese numeral systems. ... () is an abugida script used to write several Indo-Aryan languages, including Sanskrit, Hindi, Gujarati,Marathi, Sindhi, Bihari, Bhili, Marwari, Konkani, Bhojpuri, Pahari (Garhwali and Kumaoni), Santhali, Nepali, Newari, Tharu and sometimes Kashmiri and Romani. ... The Modern Hebrew language is a Semitic language of the Afro-Asiatic language family. ... Dalet - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... Khmer numerals are the numerals used in the Khmer language of Cambodia. ... A numerical prefix is a prefix that denotes a number, which is usually a multiplier for the thing being prefixed. ... For other uses, see Latins and Latin (disambiguation). ...

Binary 100
Octal 4
Duodecimal 4
Hexadecimal 4
Vigesimal 4
Look up four in
Wiktionary, the free dictionary.
This article discusses the number Four. For the year 4 AD, see 4. For other uses of 4, see 4 (disambiguation)

4 (four) is a number, numeral, and glyph. It is the natural number following 3 and preceding 5. Four is the only number in the English language for which the number of letters in its name is equal to the number itself. This is also true in several other languages, such as German, Afrikaans, Dutch, and Flemish, as "vier".[citation needed] The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ... The vigesimal or base-20 numeral system is based on twenty (in the same way in which the ordinary decimal numeral system is based on ten). ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 151 languages. ... For other uses, see 4 (disambiguation). ... Look up four in Wiktionary, the free dictionary. ... For other uses, see Number (disambiguation). ... A numeral is a symbol or group of symbols that represents a number. ... variant glyphs representing the character a (allographs of a) in the Zapfino typeface. ... In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... This article is about the number. ... Look up five in Wiktionary, the free dictionary. ... The English language is a West Germanic language that originates in England. ... For other uses, see Letter (disambiguation). ... In mathematics, two mathematical objects are considered equal if they are precisely the same in every way. ...

Contents

In mathematics

Four is the smallest composite number, its proper divisors being 1 and 2. Four is also a highly composite number. The next highly composite number is 6. A composite number is a positive integer which has a positive divisor other than one or itself. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... One redirects here. ... For other uses of 2, see 2 (disambiguation). ... A highly composite number is a positive integer which has more divisors than any positive integer below it. ... Look up six in Wiktionary, the free dictionary. ...


Four is the second square number, the second centered triangular number. In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer; in other words, it is the product of some integer with itself. ... A centered triangular number is a centered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers. ...


4 is the smallest squared prime (p2). It has an aliquot sum of 3 which is itself prime. The aliquot sequence of 4 has 4 members (4,3,1,0). Divisor function σ0(n) up to n=250 Sigma function σ1(n) up to n=250 Sum of the squares of divisors, σ2(n), up to n=250 Sum of cubes of divisors, σ3(n) up to n=250 In mathematics, and specifically in number theory, a divisor function is... For other uses, see 3 (disambiguation). ... In mathematics, an aliquot sequence is a recursive sequence which can be defined in the following way: if we write σ(n) = σ1(n) to be the divisor function normally, then, the aliquot sequence of k can be written: s0 = k sn = σ(sn−1) − sn−1 For example, the aliquot sequence... This article is about the number. ...


The prime factorization of four is two times two.


Four is the smallest composite number that is equal to the sum of its prime factors. (As a consequence of this, it is the smallest Smith number). However, it is the largest (and only) composite number n for which (n - 1)! equiv 0  ({rm mod} n) is false. A Smith number is a number which in a given base, the sum of its digits is equal to the sum of the digits in its factorization. ...


It is also a Motzkin number. In mathematics, a Motzkin number for a given number n is the number of different ways of drawing non-intersecting chords on a circle between n points. ...


In addition,  2 + 2 = 2 times 2 = 2^2 = 4 . Continuing the pattern in Knuth's up-arrow notation,  2 uparrowuparrow 2 = 2 uparrowuparrowuparrow 2 = 4, and so on, for any number of up arrows. In mathematics, Knuths up-arrow notation is a notation for very large integers introduced by Donald Knuth in 1976. ...


A four-sided plane figure is a quadrilateral (quadrangle) or square, sometimes also called a tetragon. A circle divided by 4 makes right angles. Because of it, four (4) is the base number of plane (mathematics). Four cardinal directions, four seasons, duodecimal system, and vigesimal system are based on four. This article is about the geometric shape. ... For other uses, see Square. ... This article is about the shape and mathematical concept of circle. ... This article is about angles in geometry. ... This article is about the mathematical construct. ... A compass rose showing the cardinal directions Cardinal directions or cardinal points are the four principal directions or points of the compass in plane. ... The Four Seasons can refer to: The annual cycle of the astronomical, geographic, and climatic phenomenon of season The Four Seasons, a singing group led by Frankie Valli; The Four Seasons, the collective name for four violin concertos by Antonio Vivaldi; The Four Seasons, the collective name for four tangos... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... The vigesimal or base-20 numeral system is based on twenty (in the same way in which the ordinary decimal numeral system is based on ten). ...


A solid figure with four faces is a tetrahedron. The regular tetrahedron is the simplest Platonic solid. A tetrahedron, which can also be called a 3-simplex, has four triangular faces and four vertices. It is the only self-dual regular polyhedron. For the academic journal, see Tetrahedron (journal). ... In geometry, a Platonic solid is a convex regular polyhedron. ... For the academic journal, see Tetrahedron (journal). ... A 3-simplex or tetrahedron In geometry, a simplex (plural simplexes or simplices) or n-simplex is an n-dimensional analogue of a triangle. ... In mathematics, there are three related meanings of the term polyhedron: in the traditional meaning it is a 3-dimensional polytope, and in a newer meaning that exists alongside the older one it is a bounded or unbounded generalization of a polytope of any dimension. ...


Four-dimensional space has the largest number of dimensions used by more than three convex regular figures. There are infinitely many convex regular polygons (two-dimensional); five convex regular polyhedra (three-dimensional, the five Platonic Solids); six convex regular polychora (four-dimensional); and three regular convex polytopes occupying each higher-dimensional space. For other uses, see Fourth dimension (disambiguation). ... A regular pentagon A regular polygon is a simple polygon (a polygon which does not intersect itself anywhere) which is equiangular (all angles are equal) and equilateral (all sides have the same length). ... In mathematics, there are three related meanings of the term polyhedron: in the traditional meaning it is a 3-dimensional polytope, and in a newer meaning that exists alongside the older one it is a bounded or unbounded generalization of a polytope of any dimension. ... In geometry, a Platonic solid is a convex regular polyhedron. ... In mathematics, a convex regular 4-polytope (or polychoron) is 4-dimensional polytope which is both a regular and convex. ... In geometry polytope means, first, the generalization to any dimension of polygon in two dimensions, polyhedron in three dimensions, and polychoron in four dimensions. ...


The smallest non-cyclic group has four elements; it is the Klein four-group. Four is also the order of the smallest non-trivial groups that are not simple. In group theory, a cyclic group or monogenous group is a group that can be generated by a single element, in the sense that the group has an element g (called a generator of the group) such that, when written multiplicatively, every element of the group is a power of... This picture illustrates how the hours on a clock form a group under modular addition. ... This article is about the mathematical group. ... In mathematics, a simple group is a group which is not the trivial group and whose only normal subgroups are the trivial group and the group itself. ...


Four is the maximum number of dimensions of a real division algebra (the quaternions), by a theorem of Ferdinand Georg Frobenius. In the field of mathematics called abstract algebra, a division algebra is, roughly speaking, an algebra over a field in which division is possible. ... In mathematics, the quaternions are a non-commutative extension of the complex numbers. ... A picture of Frobenius Ferdinand Georg Frobenius (October 26, 1849 – August 3, 1917) was a German mathematician, best-known for his contributions to the theory of differential equations and to group theory. ...


The four-color theorem states that a planar graph (or, equivalently, a flat map of two-dimensional regions such as countries) can be colored using four colors, so that adjacent vertices (or regions) are always different colors. Three colors are not, in general, sufficient to guarantee this. The largest planar complete graph has four vertices. Example of a four color map The four color theorem states that every possible geographical map can be colored with at most four colors in such a way that no two adjacent regions receive the same colour. ... In graph theory, a planar graph is a graph that can be drawn so that no edges intersect (or that can be embedded) in the plane. ... For other uses, see Map (disambiguation). ... In the mathematical field of graph theory, a complete graph is a simple graph where an edge connects every pair of distinct vertices. ...


Lagrange's four-square theorem states that every positive integer can be written as the sum of at most four square numbers. Three are not always sufficient; 7 for instance cannot be written as the sum of three squares. Lagranges four-square theorem, also known as Bachets conjecture, was proved in 1770 by Joseph Louis Lagrange. ... In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer; in other words, it is the product of some integer with itself. ... 7 (seven) is the natural number following 6 and preceding 8. ...


Four is the first positive non-Fibonacci number. A tiling with squares whose sides are successive Fibonacci numbers in length In mathematics, the Fibonacci numbers are a sequence of numbers named after Leonardo of Pisa, known as Fibonacci. ...


Each natural number divisible by 4 is a difference of squares of two natural numbers, i.e. 4x = y2z2.


Four is an all-Harshad number and a semi-meandric number. A Harshad number, or Niven number, is an integer that is divisible by the sum of its digits in a given number base. ... In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. ...


List of basic calculations

Multiplication 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 50 100 1000
4 times x 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100 200 400 4000
Division 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
4 div x 4 2 1.overline{3} 1 0.8 0.overline{6} 0.overline{5}7142overline{8} 0.5 0.overline{4} 0.4 0.overline{3}overline{6} 0.overline{3} 0.overline{3}0769overline{2} 0.overline{2}8571overline{4} 0.2overline{6}
x div 4 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75
Exponentiation 1 2 3 4 5 6 7 8 9 10 11 12 13
4 ^ x, 4 16 64 256 1024 4096 16384 65536 262144 1048576 4194304 16777216 67108864
x ^ 4, 1 16 81 256 625 1296 2401 4096 6561 10000 14641 20736 28561

In mathematics, multiplication is an elementary arithmetic operation. ... Look up eight in Wiktionary, the free dictionary. ... Look up twelve in Wiktionary, the free dictionary. ... 16 (sixteen) is the natural number following 15 and preceding 17. ... 20 (twenty) is the natural number following 19 and preceding 21. ... 24 (twenty-four) is the natural number following 23 and preceding 25. ... 28 (twenty-eight) is the natural number following 27 and preceding 29. ... 32 (thirty-two) is the natural number following 31 and preceding 33. ... 36 (thirty-six) is the natural number following 35 and preceding 37. ... 40 (forty) is the natural number following 39 and preceding 41. ... 44 (forty-four) is the natural number following 43 and preceding 45. ... 48 (forty-eight) is the natural number following 47 and preceding 49. ... 52 (fifty-two) is the natural number following 51 and preceding 53. ... 56 (fifty-six) is the natural number following 55 and preceding 57. ... 60 (sixty) is the natural number following 59 and preceding 61. ... 64 (sixty-four) is the natural number following 63 and preceding 65. ... 68 (sixty-eight) is the natural number following 67 and preceding 69 // Sixty-eight is a nontotient. ... 72 is the natural number following 71 and preceding 73. ... 76 is the natural number following 75 and preceding 77. ... 80 (eighty) is the natural number following 79 and preceding 81. ... 84 (eighty-four) is the natural number following 83 and preceding 85. ... 88 (eighty-eight) is the natural number following 87 and preceding 89. ... 92 (ninety-two) is the natural number following 91 and preceding 93. ... 96 is the natural number following 95 and preceding 97. ... 100 (one hundred) (the Roman numeral is C for centum) is the natural number following 99 and preceding 101. ... 200 is the natural number following 199 and preceding 201. ... Four hundred is the natural number following three hundred ninety-nine and preceding four hundred one. ... 4000 (four thousand) is the natural number following 3999 and preceding 4001. ... In mathematics, especially in elementary arithmetic, division is an arithmetic operation which is the inverse of multiplication. ... Zero redirects here. ... 25 (twenty-five) is the natural number following 24 and preceding 26. ... 75 (seventy-five) is the natural number following 74 and preceding 76. ... “Exponent” redirects here. ... 256 (two hundred [and] fifty-six, CCLVI) is the natural number following 255 and preceding 257. ... 81 is the natural number following 80 and preceding 82. ... Look up ten thousand in Wiktionary, the free dictionary. ...

Evolution of the glyph

Image:Evolution4glyph.png Evolution of the numeral 4 from the Brahmin Indians to the Europeans I drew this characters by hand and scanned them. ...


Representing 1, 2 and 3 in as many lines as the number represents worked well enough, but writing four lines proved tiresome. The Brahmin Indians simplified 4 by joining its four lines into a cross that looks like our modern plus sign. The Sunga and other Indians would add a horizontal line on top of the numeral, and the Kshatrapa and Pallava evolved the numeral to a point where speed of writing was at best a secondary concern. The Arabs didn't have time for cursive fancy: their 4 still had the early concept of the cross, but for the sake of efficiency, was made in one stroke by connecting the "western" end to the "northern" end; the "eastern" end was finished off with a curve. The Europeans dropped off the finishing curve and gradually made the numeral less cursive, ending up with a glyph very close to the original Brahmin cross.[1] Note that the word Brahmin is also known as Brahman in English due to some translation issues between the Upanishads (Hindu Holy Texts) and modern English* Brahmin, in Hinduism, traditionally refers to the priestly caste or a member of this caste in the Hindu caste system. ... The Sunga Empire (or Shunga Empire) is a Magadha dynasty that controlled North-central and Eastern India from around 185 to 73 BCE. It was established after the fall of the Indian Mauryan empire. ... For other uses, see Arab (disambiguation). ...


While the shape of the 4 character has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in Image:TextFigs148.png. The ascenders are the parts of the characters that lie above the midline, highlighted in red. ... “Font” redirects here. ... Hoefler Text, a contemporary font, uses hanging or old style text figures. ... The descenders are the parts of the characters that lie below the baseline. ... Image File history File links The numerals 1, 4 and 8 written in text figures. ...

On the seven-segment displays of pocket calculators and digital watches, 4 is seen with an open top. Image File history File links No higher resolution available. ... A seven-segment display (abbreviation: 7-seg(ment) display), less commonly known as a seven-segment indicator, is a form of display device that is an alternative to the more complex dot-matrix displays. ...


 


In religion

It has been suggested that Yahweh be merged into this article or section. ... This article is about the term God in the context of monotheism and henotheism. ... This article or section does not cite its references or sources. ... Engraving of Sarah by Hans Collaert from c. ... Rebeccah (Rebekah or Rivkah) (רִבְקָה Captivating, Enchantingly Beautiful, Noose or Snare, Standard Hebrew Rivqa, Tiberian Hebrew Riḇqāh) is the wife of Isaac. ... Look up Leah, לֵאָה in Wiktionary, the free dictionary. ... This article is about the Biblical character. ... The Four Species (note: in a kosher lulav, the aravah is placed on the left, the lulav in the center, and the hadassim on the right) The Four Species (Hebrew: ארבעה מינים) are three types of plants and one type of fruit which are held together and waved in a special ceremony... The rabbi of Zidichov waving The Lulav Lulav (‎) is a ripe, green, closed frond of the date palm tree. ... Hadass (Hebrew: הדס, pl. ... Aravah (Hebrew: ערבה, pl. ... Trinomial name Citrus medica var. ... This article is about commandments in Judaism. ... The word Jew ( Hebrew: יהודי) is used in a wide number of ways, but generally refers to a follower of the Jewish faith, a child of a Jewish mother, or someone of Jewish descent with a connection to Jewish culture or ethnicity and often a combination of these attributes. ... Sukkot (Hebrew:  ; booths. ... This article or section does not cite its references or sources. ... The word Jew ( Hebrew: יהודי) is used in a wide number of ways, but generally refers to a follower of the Jewish faith, a child of a Jewish mother, or someone of Jewish descent with a connection to Jewish culture or ethnicity and often a combination of these attributes. ... This article is about the Jewish holiday. ... This article or section does not cite its references or sources. ... The word Jew ( Hebrew: יהודי) is used in a wide number of ways, but generally refers to a follower of the Jewish faith, a child of a Jewish mother, or someone of Jewish descent with a connection to Jewish culture or ethnicity and often a combination of these attributes. ... This article is about the Jewish holiday. ... This article or section does not cite its references or sources. ... The word Jew ( Hebrew: יהודי) is used in a wide number of ways, but generally refers to a follower of the Jewish faith, a child of a Jewish mother, or someone of Jewish descent with a connection to Jewish culture or ethnicity and often a combination of these attributes. ... This article is about the Jewish holiday. ... This article or section does not cite its references or sources. ... The word Jew ( Hebrew: יהודי) is used in a wide number of ways, but generally refers to a follower of the Jewish faith, a child of a Jewish mother, or someone of Jewish descent with a connection to Jewish culture or ethnicity and often a combination of these attributes. ... This article is about the Jewish holiday. ... This article or section does not cite its references or sources. ... For other uses, see Four Horsemen. ... Visions of John of Patmos, as depicted in the Très Riches Heures du Duc de Berry. ... For the book by Scott ODell, see Zia (novel). ... For other uses, see New Mexico (disambiguation). ... The Four Noble Truths (Pali: Cattāri ariyasaccāni, Sanskrit: Catvāri āryasatyāni, Chinese: Sìshèngdì, Thai: อริยสัจสี่, Ariyasaj Sii) are one of the most fundamental Buddhist teachings. ... Buddhism, a Dharmic faith, is usually considered one of the worlds major religions, with between 230 to 500 million followers. ... For other uses, see Gospel (disambiguation). ... The Gospel of Matthew (literally, according to Matthew; Greek, Κατά Μαθθαίον or Κατά Ματθαίον, Kata Maththaion or Kata Matthaion) is a synoptic gospel in the New Testament, one of four canonical gospels. ... The Gospel of Mark, anonymous[1] but traditionally ascribed to Mark the Evangelist, is a synoptic gospel of the New Testament. ... The Gospel of Luke (literally, according to Luke; Greek, Κατά Λουκαν, Kata Loukan) is a synoptic Gospel, and the third and longest of the four canonical Gospels of the New Testament. ... For other uses, see Gospel of John (disambiguation). ...

In science

In astronomy

This article is about the Solar System. ... For other uses, see Asteroid (disambiguation). ... This article is about the Solar System. ... This article is about the planet. ... (*min temperature refers to cloud tops only) Atmospheric characteristics Atmospheric pressure 9. ... This article is about Earth as a planet. ... Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. ... This article is about the Solar System. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Atmospheric characteristics Atmospheric pressure 140 kPa Hydrogen >93% Helium >5% Methane 0. ... Atmospheric characteristics Atmospheric pressure 120 kPa Hydrogen 83% Helium 15% Methane 1. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Jupiters 4 Galilean moons, in a composite image comparing their sizes and the size of Jupiter (Great Red Spot visible). ... The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... Globular Cluster M4 (also known as Messier Object 4, Messier 4, M4, or NGC 6121) is a globular cluster in the Scorpius constellation. ... The Globular Cluster M80 in the constellation Scorpius is located about 28,000 light years from the Sun and contains hundreds of thousands of stars. ... This article is about the constellation. ... The New General Catalogue (NGC) is the best-known catalogue of deep sky objects in amateur astronomy. ... NGC 4 is a galaxy in the Pisces constellation. ... For other uses, see Galaxy (disambiguation). ... This article is about the star grouping. ... For other uses, see Pisces. ... A Saros cycle is a period of 6585 + 1/3 days (approximately 18 years 10 days and 8 hours) which can be used to predict eclipses of the sun and the moon. ... Photo taken during the 1999 eclipse. ... is the 126th day of the year (127th in leap years) in the Gregorian calendar. ... is the 164th day of the year (165th in leap years) in the Gregorian calendar. ... Time lapse movie of the 3 March 2007 lunar eclipse A lunar eclipse occurs whenever the Moon passes through some portion of the Earth’s shadow. ... is the 246th day of the year (247th in leap years) in the Gregorian calendar. ... is the 92nd day of the year (93rd in leap years) in the Gregorian calendar. ... Subgiant are Olly Maw, Dan Hayes and Tushar Joshi, a live dance music band from the UK formed in 2000. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... This article or section does not cite its references or sources. ...

In biology

Adenine Guanine Thymine Cytosine ... The structure of part of a DNA double helix Deoxyribonucleic acid, or DNA, is a nucleic acid molecule that contains the genetic instructions used in the development and functioning of all known living organisms. ... For other uses, see RNA (disambiguation). ... For the programming language Adenine, see Adenine (programming language). ... Guanine is one of the five main nucleobases found in the nucleic acids DNA and RNA; the others being adenine, cytosine, thymine, and uracil. ... Cytosine is one of the 5 main nucleobases used in storing and transporting genetic information within a cell in the nucleic acids DNA and RNA. It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at... For the similarly-spelled vitamin compound, see Thiamine Thymine, also known as 5-methyluracil, is a pyrimidine nucleobase. ... Uracil is a pyrimidine which is common and naturally occurring. ... For other uses, see RNA (disambiguation). ... Classes See below Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. ... Classes Synapsida Sauropsida Amphibia A tetrapod (Greek tetrapoda, four-legged) is a vertebrate animal having four feet, legs or leglike appendages. ... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria For the folk-rock band see The Mammals. ... The heart and lungs, from an older edition of Grays Anatomy. ... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria For the folk-rock band see The Mammals. ... Families 17, See classification The diverse order Carnivora (IPA: or ; from Latin carō (stem carn-) flesh, + vorāre to devour) includes over 260 species of placental mammals. ... Ungulates (meaning roughly hoofed or hoofed animal) make up several orders of mammals, of which six to eight survive: Artiodactyla: even-toed ungulates, cattle, sheep, goats, pigs, antelope, and many others Cetacea: whales and dolphins (which evolved from hoofed land animals) Perissodactyla: odd-toed ungulates such as horses and rhinos... Superfamilies and families Superfamily Hedyloidea: Hedylidae Superfamily Hesperioidea: Hesperiidae Superfamily Papilionoidea: Papilionidae Pieridae Nymphalidae Lycaenidae Riodinidae A butterfly is an insect of the order Lepidoptera. ... This article is about the insect. ... For other uses, see Wing (disambiguation). ... For other uses, see Blood (disambiguation). ... In mammalian oral anatomy, the canine teeth, also called cuspids, dogteeth, fangs, or (in the case of those of the upper jaw) eye teeth, are relatively long, pointed teeth. ... Incisors (from Latin incidere, to cut) are the first kind of tooth in heterodont mammals. ... Wisdom teeth are the third molars that usually appear between the ages of 16 and 24. ... Teeth redirects here. ...

In chemistry

  • Valency of carbon (that is basis of life on the Earth) is four. Thanks to its tetrahedral crystal bond structure diamond (one of the natural allotropes of carbon) is the hardest known naturally occurring material. It is also the valence of silicon, whose compounds form the majority of the mass of the Earth's crust.
  • The atomic number of beryllium
  • There are four basic states of matter: solid, liquid, gas, and plasma.

For other uses, see Carbon (disambiguation). ... This article is about the mineral. ... Not to be confused with Silicone. ... See also: List of elements by atomic number In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. ... General Name, symbol, number beryllium, Be, 4 Chemical series alkaline earth metals Group, period, block 2, 2, s Appearance white-gray metallic Standard atomic weight 9. ... This article is about matter in physics and chemistry. ... This box:      For other uses, see Solid (disambiguation). ... For other uses, see Liquid (disambiguation). ... For other uses, see Gas (disambiguation). ... For other uses, see Plasma. ...

In physics

For a generally accessible and less technical introduction to the topic, see Introduction to special relativity. ... For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. ... 2-dimensional renderings (ie. ... This article is about the concept of time. ... This article is about the idea of space. ... For other uses of this term, see Spacetime (disambiguation). ... An alpha particle is deflected by a magnetic field Alpha radiation consists of helium-4 nuclei and is readily stopped by a sheet of paper. ... A hadron, in particle physics, is a subatomic particle which experiences the nuclear force. ... A fundamental interaction is a mechanism by which particles interact with each other, and which cannot be explained by another more fundamental interaction. ... This box:      Electromagnetism is the physics of the electromagnetic field: a field which exerts a force on particles that possess the property of electric charge, and is in turn affected by the presence and motion of those particles. ... Gravity is a force of attraction that acts between bodies that have mass. ... The weak nuclear force or weak interaction is one of the four fundamental forces of nature. ... The strong nuclear force or strong interaction (also called color force or colour force) is a fundamental force of nature which affects only quarks and antiquarks, and is mediated by gluons in a similar fashion to how the electromagnetic force is mediated by photons. ...

In logic and philosophy

  • The symbolic meanings of the number four are linked to those of the cross and the square. 'almost from prehistoric times, the number four was employed to signify what was solid, what could be touched and felt. its relationship to the cross (four points) made it an outstanding symbol of wholeness and universality, a symbol which drew all to itself'. where lines of latitude and longitude intersect, they divide the earth into four proportions. throughout the world kings and chieftains have been called 'lord of the four suns'...'lord of the four quarters of the earth'... by which is understood to the extent of their powers both territorially and in terms of total control of their subjects' doings.
  • The Square of Opposition, in both its Aristotelian version and its Boolean version, consists of four forms: A ("All S is R"), I ("Some S is R"), E ("No S is R"), and O ("Some S is not R").
  • Aristotle held that there are basically four causes in nature: the efficient cause, the matter, the end, and the form.
  • Immanuel Kant expounded a table of judgments involving four three-way alternatives, in regard to 1. Quantity, 2. Quality, 3. Relation, 4. Modality, and, based thereupon, a table of four categories, named by the terms just listed, and each with three subcategories.
  • Arthur Schopenhauer's doctoral thesis was On the Fourfold Root of the Principle of Sufficient Reason.
  • C.S. Peirce, usually a trichotomist, discussed four basic methods of seeking to settle questions and arrive at firm beliefs: the method of tenacity (sticking to that which one is inclined to think), the method of authority, the a priori method, and the method of science. (See "The Fixation of Belief," 1877, Eprint.)
  • Jonathan Lowe (E.J. Lowe) argues in The Four-Category Ontology, 2006, for four categories: objects, attributes, kinds, and modes (by "modes" he means property-particulars, also known as "tropes"). (See Lowe's "Recent Advances in Metaphysics," 2001, Eprint)

The Square of Opposition is a term from the study of Aristotelian logic or Term Logic in which the logical relationship between various types of sentences is spelled out. ... The Square of Opposition is a term from the study of Aristotelian logic or Term Logic in which the logical relationship between various types of sentences is spelled out. ... The Square of Opposition is a term from the study of Aristotelian logic or Term Logic in which the logical relationship between various types of sentences is spelled out. ... For other uses, see Aristotle (disambiguation). ... For other uses, see Aristotle (disambiguation). ... The efficient cause is a philosophical concept proposed by Aristotle. ... The Material Cause, that out of which the statue is made, is the marble or bronze. ... Final cause is one of Aristotles four forms of causation (the others being material, formal, and efficient). ... Formal cause is a concept used by Aristotle, and originates from the idea of the form by Plato and Socrates. ... Kant redirects here. ... In Kants philosophy, a category is a pure concept of the understanding. ... In Kants philosophy, a category is a pure concept of the understanding. ... Arthur Schopenhauer (February 22, 1788 – September 21, 1860) was a German philosopher best known for his work The World as Will and Representation. ... Originally published as a doctoral dissertation in 1813, Arthur Schopenhauer revised this important work and re-published it in 1847. ... Charles Sanders Peirce Charles Sanders Peirce (September 10, 1839 – April 19, 1914) was an American logician, philosopher, scientist, and mathematician. ... Jonathan Lowe (E.J. Lowe) (born 1950) is currently Professor of Philosophy and Chair of the Examination Board of the Department of Philosophy at the University of Durham, England. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...

In technology

4 as a resin identification code, used in recycling.
  • Most furniture has four legs - tables, chairs, etc.
  • Four horses (quadriga) is the maximal number of horses in one row for carriage.
  • Wide use of rectangles (with four angles and four sides) because they have effective form and capability for close adjacency to each other (houses, rooms, tables, bricks, sheets of paper, screens, film frames).
  • On most phones, the 4 key is associated with the letters G, H, and I, but on the BlackBerry it is the key for D and F.
  • In internet slang, "4" can replace the word "for" (as "four" and "for" are pronounced similarly). For example, typing "4u" instead of "for you".
  • In Leetspeak, "4" may be used to replace the letter "A".
  • In Expressing love, "4" may be used to replace the word "Love" (143).

Sorted household plastic waiting to be hauled away for reprocessing. ... The Trikke is a Human Powered Vehicle (HPV) Automobiles are among the most commonly used engine powered vehicles. ... For other uses, see Wheel (disambiguation). ... For the UK band, see Furniture (band). ... Binomial name Equus caballus Linnaeus, 1758 The horse (Equus caballus, sometimes seen as a subspecies of the Wild Horse, Equus ferus caballus) is a large odd-toed ungulate mammal, one of ten modern species of the genus Equus. ... Four-color printing creates an image using the subtractive colors cyan, yellow, magenta, and black. ... Cyan, magenta, yellow, and key (black) CMYK (or sometimes YMCK) is a subtractive color model used in color printing. ... For other uses, see Print. ... A 5 by 4 rectangle In geometry, a rectangle is defined as a quadrilateral where all four of its angles are right angles. ... The Rich Text Format (often abbreviated to RTF) is a proprietary document file format developed by Microsoft in 1987 for cross-platform document interchange. ... Chinese (written) language (pinyin: zhōngw n) written in Chinese characters The Chinese language (汉语/漢語, 华语/華語, or 中文; Pinyin: H nyǔ, Hu yǔ, or Zhōngw n) is a member of the Sino-Tibetan family of languages. ... This article is about the payment system. ... For other uses of G, see G (disambiguation). ... Look up H, h in Wiktionary, the free dictionary. ... Look up I, i in Wiktionary, the free dictionary. ... This article is about the fruit. ... For other uses, see D (disambiguation). ... For other uses of F, see F (disambiguation). ... A 104-key PC US English QWERTY keyboard layout The Dvorak Simplified Keyboard layout A standard Hebrew keyboard showing both Hebrew and QWERTY. A computer keyboard is a peripheral partially modelled after the typewriter keyboard. ... $ redirects here. ... The shift key on a modern Windows keyboard The shift key is a modifier key on a keyboard, used to type capital letters and other alternate upper characters. ... This article is about the unit of information. ... For other uses, see Nibble (disambiguation). ... For other users of the word/name byte, see byte (disambiguation). ... Internet slang, Internet language, Netspeak, Chat Room Shorthand, Computer Language, Tech-Talk (as used by some chatroom users) or Nu English is slang that Internet users have coined and promulgated. ... This article does not adequately cite its references or sources. ...

In sports

In the sport of cricket, a four is a specific type of scoring event, scoring four runs. This article is about the sport. ... A traditional boundary rope. ...


In rugby union, the number of the lock forward, who usually jumps at number 2 in the line-out. For other uses, see Rugby (disambiguation). ... A normal rugby union team formation illustrating each of the positions and their respective numbers. ... A rugby lineout. ...


In rugby league, the number of one of the two centres. It is also the number of points awarded for a try. Rugby league football is a full-contact team sport played with a prolate spheroid-shaped ball by two teams of thirteen on a rectangular grass field. ... A typical rugby league team consists of thirteen players on the field plus four substitutes on the bench. ... This article refers to the use of the word Try in rugby football terminology. ...


In baseball, 4 represents the second baseman's position. It was also the jersey number of Lou Gehrig, Mel Ott, Joe Cronin, and Paul Molitor. It was the jersey number of Earl Weaver, long-time manager of the Baltimore Orioles. This article is about the sport. ... The position of the second baseman Second base redirects here. ... Henry Louis Lou Gehrig (June 19, 1903 â€“ June 2, 1941), born Ludwig Heinrich Gehrig[2], was an American baseball player in the 1920s and 1930s, who set several Major League records and was popularly called the The Iron Horse[2] for his durability. ... Melvin Thomas Mel Ott (March 2, 1909 – November 21, 1958), nicknamed Master Melvin, was a Major League Baseball right fielder who played his entire career for the New York Giants (1926-1947). ... Joe Cronin Joseph Edward Cronin (October 12, 1906 – September 7, 1984) was a Major League Baseball player from 1926 to 1945 and manager from 1933 to 1947. ... Reverse side of a Paul Molitor baseball card Paul Leo Molitor (born August 22, 1956 in St. ... Earl Sidney Weaver (born August 14, 1930 in St. ...


In basketball, 4 represents the power forward position. Also, The term Final Four refers to the last four teams remaining in the NCAA playoff tournament. If a player completes a three-pointer while being fouled, the player is awarded one free-throw for a possible 4-point-play. The number for the Toronto Raptors forward Chris Bosh. This article is about the sport. ... Power forward is a position in the sport of basketball. ... Final Four is a sports term that is commonly applied to the last four teams remaining in a playoff tournament. ... Sara Giauro shoots a three-point shot, FIBA Europe Cup for Women Finals 2007 In basketball, a three-point field goal, three-pointer, three-point shot, or simply three is a field goal made from beyond the three point line, a designated semi-ellipsoid arc radiating from the basket. ... For the professional wrestler, see Chris Bosh (wrestler). ...


In ice hockey, 4 was the jersey number worn by Hall of Famers Jean Beliveau, Bobby Orr, Scott Stevens and Rob Blake. Ice hockey, known simply as hockey in areas where it is more common than field hockey, is a team sport played on ice. ... Jean Arthur Béliveau, born August 31, 1931 in Trois-Rivières, Quebec, Canada was a professional ice hockey player. ... Robert Gordon Bobby Orr, OC (born March 20, 1948 in Parry Sound, Ontario) is a retired Canadian ice hockey defenseman, and is considered to be one of the greatest hockey players of all time. ... For other persons named Scott Stevens, see Scott Stevens (disambiguation). ... Robert Bowlby Rob Blake (born December 10, 1969, in Simcoe, Ontario) is a professional ice hockey defenseman in the NHL, playing for the Los Angeles Kings. ...


In American football, 4 is today most commonly identified with the jersey number of former Green Bay Packers quarterback Brett Favre. United States simply as football, is a competitive team sport that is both fast-paced and strategic. ... Packers redirects here. ... Brett Hillbilly Favre (pronounced Farv, born on October 10, 1969 in Gulfport, Mississippi [1]) is an American football player, currently starting quarterback for the Green Bay Packers of the National Football League (NFL). ...


In rowing, a four refers to a boat for four rowers, with or without coxswain. In rowing nomenclature 4- reprsents a coxless four and 4+ represents a coxed four. A coxless pair which is a sweep-oar boat. ... For other uses, see Boat (disambiguation). ... The coxswain (pronounced cox-ən; often called the cox) is the person in charge of a boat, particularly its navigation and steering. ...


In soccer football, number 4 is often assigned to a centre back.and a number of luck. Soccer redirects here. ... In the sport of Association football, each of the eleven players in a team are assigned to a particular named position on the field of play. ...


In other fields

See also 4 (disambiguation). Image File history File links ICS_Four. ... Image File history File links ICS_Four. ... The system of international maritime signal flags is a way of representing individual letters of the alphabet on ships or in nautical situations. ... Look up four in Wiktionary, the free dictionary. ...

  • Four is the universal number for women, as symbolically suggested in literature throughout history[citation needed]
  • Four can be used as an obscenity in some technologically adept circles, replacing the common word for fornication. This usage derives from the fact that when counting in binary on ones fingers, 4, whose binary representation is 001002 is represented by raising the middle finger of one hand, yielding a vulgar gesture. A stronger variation uses the number 132, whose binary representation 0010000100 replicates this gesture on both hands.
  • A four-letter word is used to describe most swear words in the English language, as most such terms do indeed possess four letters.
  • Four (四, formal writing: 肆, pinyin sì) is considered an unlucky number in Chinese, Korean, and Japanese cultures because it sounds like the word "death" (死, pinyin sǐ). Due to that, many numbered product lines skip the "four": e.g. Nokia cell phones (there is no series beginning with a 4), Palm PDAs, the Leisure Suit Larry games, etc. Some buildings skip floor 4 or replace the number with the letter "F", particularly in heavily Asian areas. See tetraphobia and Numbers in Chinese culture.
  • In the NATO phonetic alphabet, the digit 4 is called "fower".
  • The number of characters in a canonical four-character idiom.
  • The number of strings on a violin, a viola, a cello, double bass, a cuatro and a ukulele, and the number of string pairs on a mandolin.
  • The designation of Interstate 4, a freeway in Florida.
  • The number of arms possessed by video game villain Goro.
  • The number of fingers that people have in many animated cartoons.
  • Four, an album by Blues Traveler
  • 4, an album by Foreigner
  • The number of completed, numbered symphonies by Johannes Brahms
  • In Astrology, Cancer is the 4th astrological sign of the Zodiac.
  • 4 is one of the "Lost Numbers" on the television show, Lost, along with 8, 15, 16, 23, and 42.
  • Arthur Conan Doyle wrote a book titled "The Sign of Four"
  • In Tetris, every shape in the game is formed of 4 blocks each. Also the game was named after "tetra" the Greek word for 4.
  • 4 is a symbol for for in computer chats.
  • some people think the number 4 is an unlucky number.

Obscenity in Latin obscenus, meaning foul, repulsive, detestable, (possibly derived from ob caenum, literally from filth). The term is most often used in a legal context to describe expressions (words, images, actions) that offend the prevalent sexual morality of the time. ... This article is about the vulgar gesture. ... 132 is the natural number following 131 and preceding 133. ... This article is being considered for deletion in accordance with Wikipedias deletion policy. ... Swearing originally meant making an oath, and this usage is still used today in official and legal contexts. ... The English language is a West Germanic language that originates in England. ... Pinyin, more formally called Hanyu Pinyin (Simplified Chinese: ; Traditional Chinese: ; Pinyin: ), is the most common variant of Standard Mandarin romanization system in use. ... Numerology is an arcane study of the purported mystical relationship between numbers and the character or action of physical objects and living things. ... Chinese culture has roots going back over five thousand years. ... The traditional culture of Korea is shared by South Korea and North Korea, but there are regional differences. ... Pinyin, more formally called Hanyu Pinyin (Simplified Chinese: ; Traditional Chinese: ; Pinyin: ), is the most common variant of Standard Mandarin romanization system in use. ... This article is about the telecommunications corporation. ... Cellular redirects here. ... palmOnes Logo palmOne, Inc. ... User with Treo (PDA with smartphone functionality) Personal digital assistants (PDAs) are handheld computers, but have become much more versatile over the years. ... Leisure Suit Larry 7: Love for Sail! Leisure Suit Larry is the title character of a series of adult adventure games written by Al Lowe and published by Sierra On-Line from the 1980s to the present. ... This article or section does not adequately cite its references or sources. ... In Chinese culture, certain numbers are believed by some to be auspicious (吉利) or inauspicious (不利) based on the Chinese word that the number name sounds similar to. ... FAA radiotelephony phonetic alphabet and Morse code chart. ... 成语 chéngyǔ Four-character idioms, or chéngyǔ (成語/成语, literally to become (part of) the language) are widely used in 文言 Classical Chinese, a literary form used in the Chinese written language from antiquity to until 1919, and are still commonly used in Vernacular writing today. ... For the Anne Rice novel, see Violin (novel). ... For other uses, see Viola (disambiguation). ... This article is about the stringed musical instrument. ... Side and front views of a modern double bass with a French bow. ... Venezuelan Cuatro The cuatro is any of several Latin American instruments of the guitar or lute family. ... The ukulele (from Hawaiian: , pronounced ), variantly spelled ukelele (particularly in the UK), or alternately abbreviated uke, is a chordophone classified as a plucked lute; it is a subset of the guitar family of instruments, generally with four strings or four courses of strings. ... This article is about the musical instrument. ... Wikimedia Commons has media related to: Interstate 4 An old shield in Orlando, Florida Interstate 4 (abbreviated I-4) is a 132. ... This article is about the U.S. State of Florida. ... Goro is a fictional character in the Mortal Kombat fighting game series. ... An animated cartoon is a short, hand-drawn (or made with computers to look similar to something hand-drawn) film for the cinema, television or computer screen, featuring some kind of story or plot (even if it is a very short one). ... Four is the breakthrough album by American jam band Blues Traveler, released on September 13, 1994 (see 1994 in music). ... Blues Traveler is an American alternative rock/blues rock/jam band formed in Princeton, New Jersey, in 1983. ... 4 is the fourth album by American rock band Foreigner, released in 1981 (see 1981 in music). ... Foreigner is a hard rock band formed in New York City in 1976 by veteran musicians Mick Jones and ex-King Crimson member Ian McDonald, along with then-unknown vocalist Lou Gramm (Louis Grammatico). ... Johannes Brahms Johannes Brahms (May 7, 1833 – April 3, 1897) was a German composer of the Romantic period. ... Hand-coloured version of the anonymous Flammarion woodcut (1888). ... Cancer (IPA: , Latin: , symbol , ) is one of the thirteen constellations of the zodiac. ... Astrological represent twelve equal segments or divisions of the zodiac. ... For other uses, see Zodiac (disambiguation). ... The television show Lost includes a number of mysterious elements that have been ascribed to science fiction or supernatural phenomena, usually concerning coincidences, synchronicity, temporal and spatial anomalies, paradoxes and other puzzling phenomena. ... LOST redirects here. ... Look up eight in Wiktionary, the free dictionary. ... 15 (fifteen) is the natural number following 14 and preceding 16. ... 16 (sixteen) is the natural number following 15 and preceding 17. ... 23 (twenty-three) is the natural number following 22 and preceding 24. ... Look up forty-two in Wiktionary, the free dictionary. ... Sir Arthur Ignatius Conan Doyle, DL (22 May 1859 – 7 July 1930) was a Scottish author most noted for his stories about the detective Sherlock Holmes, which are generally considered a major innovation in the field of crime fiction, and for the adventures of Professor Challenger. ... The Sign of Four (1890) was the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle. ... For other uses, see 4 (disambiguation). ... For other uses, see 4 (disambiguation). ...

In Music

In Western Music, common time is constructed of four beats. Western music is the genres of music originating in the Western world (Europe and its former colonies) including Western classical music, American Jazz, Country and Western, pop music and rock and roll. ... The time signature (also known as meter signature) is a notational device used in Western musical notation to specify how many beats are in each bar and which note value (minim, crotchet, eighth note and so on) constitutes one beat. ...


Groups of four

3 + 2 = 5 with apples, a popular choice in textbooks[1] This article is about addition in mathematics. ... 5 - 2 = 3 (verbally, five minus two equals three) An example problem Subtraction is one of the four basic arithmetic operations; it is the inverse of addition. ... In mathematics, multiplication is an elementary arithmetic operation. ... In mathematics, especially in elementary arithmetic, division is an arithmetic operation which is the inverse of multiplication. ... Many ancient philosophies used a set of archetypal classical elements to explain patterns in nature. ... For other uses, see Fire (disambiguation). ... Look up air in Wiktionary, the free dictionary. ... Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ... This article is about Earth as a planet. ... This article or section is in need of attention from an expert on the subject. ... Spring is one of the four temperate seasons. ... For other uses, see Summer (disambiguation). ... This article is about the temperate season. ... For other uses, see Winter (disambiguation). ... Look up day in Wiktionary, the free dictionary. ... This article is about the time of day. ... Morning mist Morning Forest The word morning originally referred to the sunrise, but has been extended to mean the whole early part of the day, from dawn to noon. ... Look up Afternoon in Wiktionary, the free dictionary. ... Informally, the evening is the period in which the daylight is decreasing, between the late afternoon and night; it extends from the latter portion of the daylight (before sunset) until dark (after sunset). ... A compass rose showing the cardinal directions Cardinal directions or cardinal points are the four principal directions or points of the compass in plane. ... Look up North in Wiktionary, the free dictionary. ... For other uses, see South (disambiguation). ... A compass rose For other uses, see East (disambiguation). ... A compass rose with west highlighted This article refers to the cardinal direction; for other uses see West (disambiguation). ... This article needs additional references or sources for verification. ... For the sanguine humor, see Four Temperaments. ... Choleric is a temperament in the ancient medical theory of the four humours. ... Melancholia (Greek μελαγχολια) was described as a distinct disease as early as the fifth and fourth centuries BC in the Hippocratic writings. ... Phlegmatic is a temperament in the theory of the four humours. ... This article is about humors in Greco-Roman medicine. ... For other uses, see Blood (disambiguation). ... Choleric is a temperament in the ancient medical theory of the four humours. ... Melancholia (Greek μελαγχολια) was described as a distinct disease as early as the fifth and fourth centuries BC in the Hippocratic writings. ... Phlegm (pronounced ) is sticky fluid secreted by the typhoid membranes of animals. ... Numerous cities have been the capital of China during the course of history. ... The Four Corner Method (literal translation) (Traditional Chinese: ; Simplified Chinese: ; Pinyin: ) is a character input method used for encoding Chinese characters either into a computer, or a manual typewriter, using four numerical digits per character. ... The Four Cardinal Principles (Chinese: 四項基本原則, pinyin: sì xiàng jÄ«bÄ›n yuánzé) were stated by Deng Xiaoping in 1979 and are the four issues for which debate was not allowed within the Peoples Republic of China. ... Topics in Christianity Preaching Prayer Ecumenism Relation to other religions Movements Music Liturgy Calendar Symbols Art Criticism Christianity Portal This box:      Christianity is a monotheistic[1] religion centered on the life and teachings of Jesus of Nazareth as presented in the New Testament. ... For the genre of Christian-themed music, see gospel music. ... The symbols of the four Evangelists are here depicted in the Book of Kells The Four Evangelists are the four followers of Jesus to whom are ascribed the writings forming the four Gospels of the New Testament: the Matthew, Mark, Luke and John. ... Matthew the Evangelist (מתי, Gift of the LORD, Standard Hebrew and Tiberian Hebrew: Mattay; Septuagint Greek: Ματθαίος, Matthaios), most often called Saint Matthew, is an important Christian figure, and one of Jesus Twelve Apostles. ... Mark the Evangelist (מרקוס, Greek: Μάρκος) (1st century) is traditionally believed to be the author of the Gospel of Mark and a companion of Peter. ... Luke the Evangelist (לוקא, Greek: Loukas) is said by tradition to be the author of both the Gospel of Luke and the Acts of the Apostles, the third and fifth books of the New Testament. ... St John the Evangelist, imagined by Jacopo Pontormo, ca 1525 (Santa Felicita, Florence) John the Evangelist (d. ... For other uses, see Four Horsemen. ... -1... <nowiki>Insert non-formatted text hereBold text</nowiki>A famine is a social and economic crisis that is commonly accompanied by widespread malnutrition, starvation, epidemic and increased mortality. ... Look up pestilence in Wiktionary, the free dictionary. ... For other uses, see Death (disambiguation). ... “Trump card” redirects here. ... Set of 78 French style playing cards with twenty two atouts, typically used to play French Tarot Set of 52 French style playing cards with two jokers Set of 52 Anglo-American style playing cards Some typical Anglo-American playing cards from the Bicycle brand Paul Cézanne - The Card... For other uses, see Fork (disambiguation). ... For other uses, see Nation (disambiguation). ... For other uses, see England (disambiguation). ... This article is about the country. ... This article is about the country. ... Northern Ireland (Irish: , Ulster Scots: Norlin Airlann) is a constituent country of the United Kingdom lying in the northeast of the island of Ireland, covering 5,459 square miles (14,139 km², about a sixth of the islands total area). ... The Four Noble Truths (Pali: Cattāri ariyasaccāni, Sanskrit: Catvāri āryasatyāni, Chinese: Sìshèngdì, Thai: อริยสัจสี่, Ariyasaj Sii) are one of the most fundamental Buddhist teachings. ... A replica of an ancient statue found among the ruins of a temple at Sarnath Buddhism is a philosophy based on the teachings of the Buddha, Siddhārtha Gautama, a prince of the Shakyas, whose lifetime is traditionally given as 566 to 486 BCE. It had subsequently been accepted by... For other uses, see Politics (disambiguation). ... Public Administration can be broadly described as the development, implementation and study of government policy. ... In the law, the judiciary or judicial system is the system of courts which administer justice in the name of the sovereign or state, a mechanism for the resolution of disputes. ... // Journalism is the discipline of gathering, writing and reporting news, and broadly it includes the process of editing and presenting the news articles. ... In modern times, television reporters are part of the fourth estate. ... The marker at the exact Four Corners point. ... Federal courts Supreme Court Circuit Courts of Appeal District Courts Elections Presidential elections Midterm elections Political Parties Democratic Republican Third parties State & Local government Governors Legislatures (List) State Courts Local Government Other countries Atlas  US Government Portal      A U.S. state is any one of the fifty subnational entities of... Official language(s) English Demonym Coloradan Capital Denver Largest city Denver Largest metro area Denver-Aurora Metro Area Area  Ranked 8th in the US  - Total 104,185 sq mi (269,837 km²)  - Width 280 miles (451 km)  - Length 380 miles (612 km)  - % water 0. ... This article is about the U.S. state. ... For other uses, see New Mexico (disambiguation). ... Official language(s) English Spoken language(s) English 74. ... This article is about the superheroes. ... TMNT redirects here. ... This article does not cite any references or sources. ... The Juilliard String Quartet performing in 1963. ... The White Album, see The Beatles (album). ... The Gang of Four (Simplified Chinese: ; Traditional Chinese: ; Hanyu Pinyin: ) was a group of Communist Party of China leaders in the Peoples Republic of China who were arrested and removed from their positions in 1976, following the death of Mao Zedong, and were primarily blamed for the events of... In modern usage, the term communist party is generally used to identify any political party which has adopted communist ideology. ... This article is about the Peoples Republic of China. ... Gang of Four is an English post-punk group from Leeds. ... Post punk generally refers to the particularly fertile and creative period following the initial punk rock explosion. During the first wave of punk, roughly spanning 1976-1983, bands such as The Sex Pistols, The Clash, The Ramones and The Damned began to challenge the current styles and conventions of rock... Rock and roll (also spelled Rock n Roll, especially in its first decade), also called rock, is a form of popular music, usually featuring vocals (often with vocal harmony), electric guitars and a strong back beat; other instruments, such as the saxophone, are common in some styles. ... For other uses, see Quartet (disambiguation). ... A quartet is a common ensemble in musical history. ... Pac-Man is an arcade game developed by Namco and licensed for distribution by Midway Games in 1979. ... Pac-Man is an arcade game developed by Namco and licensed for distribution by Midway Games in 1979. ... Ms. ... This 1992 food pyramid diagram can still be found on much of the food packaging in the United States The improved American food guide pyramid, informally known as the food pyramid, was a nutrition guide created by the USDA. Released in 1992, the food pyramid suggested how much of each... For other uses, see Garden of Eden (disambiguation). ... Genesis redirects here. ... The Pishon is mentioned in the Biblical Genesis (2:11) as one of four rivers branching off from a single river within Eden. ... Syr Darya (also known as Syrdarya or Sirdaryo) is a river in Central Asia. ... Gihon is the title of a river first mentioned in the second chapter of the Biblical book of Genesis. ... The Amu Darya (Darya means river) rises in the Pamirs and flows mainly north-west through the Hindu Kush, Uzbekistan to join the Aral Sea in a large delta. ... The Tigris is the eastern member of the pair of great rivers that define Mesopotamia, along with the Euphrates, which flows from the mountains of Anatolia through Iraq. ... For the song River Euphrates by the Pixies, see Surfer Rosa. ... Teletubbies is a BBC childrens television series, particularly aimed at young children, produced from 1997 to 2001 by Ragdoll Productions. ...

References

  1. ^ Georges Ifrah, The Universal History of Numbers: From Prehistory to the Invention of the Computer transl. David Bellos et al. London: The Harvill Press (1998): 394, Fig. 24.64
  • Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 55 - 58

External links


  Results from FactBites:
 
Probability (783 words)
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4 (number) - Wikipedia, the free encyclopedia (1736 words)
As a consequence of this, it is the smallest Smith number.
The Arabs didn't have time for cursive fancy: their 4 still had the early concept of the cross, but for the sake of efficiency, was made in one stroke by connecting the "western" end to the "northern" end; the "eastern" end was finished off with a curve.
The number of strings on a violin, a viola, a cello, double bass, and a ukulele, and the number of string pairs on a mandolin.
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