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Encyclopedia > 30 (number)

30 (thirty) is the natural number following 29 and preceding 31. In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... 29 (twenty-nine) is the natural number following 28 and preceding 30. ... 31 (thirty-one) is the natural number following 30 and preceding 32. ...

30 31 32 33 34 35 36 37 38 39 29 (twenty-nine) is the natural number following 28 and preceding 30. ... 31 (thirty-one) is the natural number following 30 and preceding 32. ... 32 (thirty-two) is the natural number following 31 and preceding 33. ... 33 (thirty-three) is the natural number following 32 and preceding 34. ... 34 (thirty-four) is the natural number following 33 and preceding 35. ... 35 (thirty-five) is the natural number following 34 and preceding 36. ... 36 (thirty-six) is the natural number following 35 and preceding 37. ... 37 (thirty-seven) is the natural number following 36 and preceding 38. ... 38 (thirty-eight) is the natural number following 37 and preceding 39. ... 39 (thirty-nine) is the natural number following 38 and preceding 40. ... 40 (forty) is the natural number following 39 and preceding 41. ...

List of numbersIntegers This is a list of articles about numbers (not about numerals). ... The integers are commonly denoted by the above symbol. ...

0 10 20 30 40 50 60 70 80 90 For other senses of this word, see zero or 0. ... This article is about the number 10. ... 20 (twenty) is the natural number following 19 and preceding 21. ... 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 30
Ordinal 30th
Numeral system trigesimal
Factorization 2cdot 3cdot 5
Divisors 1, 2, 3, 5, 6, 10, 15, 30
Roman numeral XXX
Roman numeral (Unicode) XXX, xxx
Binary 11110
Octal 36
Duodecimal 26
Hexadecimal 1E
Hebrew ל (Lamed)
Look up thirty in
Wiktionary, the free dictionary.


Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set, known as its cardinality. ... In set theory, ordinal, ordinal number, and transfinite ordinal number refer to a type of number introduced by Georg Cantor in 1897, to accommodate infinite sequences and to classify sets with certain kinds of order structures on them. ... This article is about different methods of expressing numbers with symbols. ... Base 30 or trigesimal is a positional numeral system using 30 as the radix. ... ... 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. ... 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 Modern Hebrew language is a Semitic language of the Afro-Asiatic language family. ... Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ...

In mathematics

It is a primorial as well as the sum of the squares of the integers 1, 2, 3 and 4. It is the smallest Giuga number. For n ≥ 2, the primorial n# is the product of all prime numbers less than or equal to n. ... A Giuga number is a composite number n such that each of its distinct prime factors pi is a divisor of . ...

30 is the smallest sphenic number, and the smallest of the form 2cdot 3cdot r where r is a prime greater than 3. 30 has an aliquot sum of 42 and all sphenic numbers of this form have an aliquot sum 12 greater than themselves. The aliquot sequence of 30 is 16 members long, it comprises (30,42,54,66,90,144,259,45,33,15,9,4,3,1,0) A sphenic number is a positive integer that is the product of three distinct prime factors. ... 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... Wikipedia does not yet have an article with this exact name. ... 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... 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...

It is the sum of the first four squares, which makes it a square pyramidal number. Adding up some subsets of its divisors (e.g., 5, 10 and 15) gives 30, hence 30 is a semiperfect number. A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ... In mathematics, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors. ...

30 is the largest number such that coprimes smaller than itself are also prime.[1] In mathematics, the integers a and b are said to be coprime or relatively prime if they have no common factor other than 1 and −1, or equivalently, if their greatest common divisor is 1. ...

A polygon with thirty sides is called a tricontagon. Both an icosahedron and a dodecahedron have 30 edges. Look up polygon in Wiktionary, the free dictionary. ... Image:Triacontagon. ... [Etymology: 16th century: from Greek eikosaedron, from eikosi twenty + -edron -hedron], icosahedral adjective An icosahedron noun (plural: -drons, -dra ) is any polyhedron having 20 faces, but usually a regular icosahedron is implied, which has equilateral triangles as faces. ... A dodecahedron is any polyhedron with twelve faces, but usually a regular dodecahedron is meant: a Platonic solid composed of twelve regular pentagonal faces, with three meeting at each vertex. ...

E8 has Coxeter number 30. Graph of E8 Gosset polytope, 42,1 Coxeter-Dynkin diagram: . It features superscript or subscript characters that are substituted or omitted because of technical limitations. ... The introduction of this article does not provide enough context for readers unfamiliar with the subject. ...

30 is a Harshad 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 science

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 zinc, Zn, 30 Chemical series transition metals Group, period, block 12, 4, d Appearance bluish pale gray Standard atomic weight 65. ...


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 M30 (also known as Messier Object 30, Messier 30, M30, or NGC 7099) is a globular cluster in the Capricornus constellation. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... 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 star grouping. ... Pegasus (IPA: ) is a northern constellation, named after the mythological winged horse Pegasus. ... The New General Catalogue (NGC) is the most well-known catalogue of deep sky objects in amateur astronomy. ... Pegasus (IPA: ) is a northern constellation, named after the mythological winged horse Pegasus. ... 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 275th day of the year (276th in leap years) in the Gregorian calendar. ... // Ur seen across the Royal tombs, with the Great Ziggurat in the background, January 17, 2004 2100 BC — Beginning of the Xia Dynasty, the first dynasty and government system in China. ... is the 77th day of the year (78th in leap years) in the Gregorian calendar. ... Centuries: 7th century BC - 6th century BC - 5th century BC Decades: 620s BC 610s BC 600s BC 590s BC 580s BC - 570s BC - 560s BC 550s BC 540s BC 530s BC 520s BC Events and Trends 579 BC - Servius Tullius succeeds the assassinated Lucius Tarquinius Priscus as king of Rome. ... Time lapse movie of the 3 March 2007 lunar eclipse A lunar eclipse occurs whenever the Moon passes through some portion of the Earths shadow. ... is the 170th day of the year (171st in leap years) in the Gregorian calendar. ... Pyramid of Senusret II at El-Lahun. ... is the 230th day of the year (231st in leap years) in the Gregorian calendar. ... Centuries: 6th century BC - 5th century BC - 4th century BC Decades: 530s BC 520s BC 510s BC 500s BC 490s BC - 480s BC - 470s BC 460s BC 450s BC 440s BC 430s BC Years: 492 BC 491 BC 490 BC 489 BC 488 BC - 487 BC - 486 BC 485 BC...

In other fields

Thirty is:

February 30 occurs in some calendars, unlike the Gregorian calendar, where February contains only 28 or 29 days. ... Tonality is the character of music written with hierarchical relationships of pitches, rhythms, and chords to a center or tonic. ... A wedding anniversary is an anniversary which falls on the month and day a particular wedding took place, and which recurs every subsequent year, except for those who were married on February 29th. ... Combatants Sweden  Bohemia Denmark-Norway (Until 1643) Dutch Republic France Scotland England Saxony  Holy Roman Empire ( Catholic League) Spain Austria Bavaria Commanders Frederick V Buckingham Leven Gustav II Adolf â€  Johan Baner Cardinal Richelieu Louis II de Bourbon Turenne Christian IV of Denmark Bernhard of Saxe-Weimar Johann Georg I of... Definition A news agency is an organization of journalists established to supply news reports to organizations in the news trade: newspapers, magazines, and radio and television broadcasters. ... Superman is a fictional character and comic book superhero , originally created by American writer Jerry Siegel and Canadian artist Joe Shuster and published by DC Comics. ... The Daily Planet is a fictional broadsheet newspaper that appears in Superman stories published by DC Comics. ... This is a list of country calling codes, also known as international direct dialing (IDD) codes, which are needed to access international telephone services. ... Looking south down Bishopsgate, one of the main roads leading through Londons financial district. ... Interstate 30 (abbreviated I-30) is an interstate highway in the southern United States. ... Official language(s) No official language See languages of Texas Capital Austin Largest city Houston Largest metro area Dallas–Fort Worth–Arlington Area  Ranked 2nd  - Total 261,797 sq mi (678,051 km²)  - Width 773 miles (1,244 km)  - Length 790 miles (1,270 km)  - % water 2. ... Official language(s) English Capital Little Rock Largest city Little Rock Largest metro area Little Rock Metropolitan Area Area  Ranked 29th  - Total 53,179 sq mi (137,002 km²)  - Width 239 miles (385 km)  - Length 261 miles (420 km)  - % water 2. ... U.S. Route 30 is an east-west main route of the system of United States Numbered Highways. ... Official language(s) (none)[1] Capital Salem Largest city Portland Area  Ranked 9th  - Total 98,466 sq mi (255,026 km²)  - Width 260 miles (420 km)  - Length 360 miles (580 km)  - % water 2. ... This article is about the U.S. state. ... New York State Route 30 is a state highway in the central part of New York, USA. The highway runs from the Southern Tier to the border of Canada. ... European route E30 extends from the southern Irish port of Cork in the west to the Russian city of Samara in the east. ... This article is about the city in the Republic of Ireland. ... Samara (Russian: ) (from 1935 to 1991—Kuybyshev ()) is the sixth-largest city in Russia. ... The White Album, see The Beatles (album). ... An album or record album is a collection of related audio or music tracks distributed to the public. ... The self-titled double album The Beatles, released by the Beatles in 1968 at the height of their popularity, is often hailed as one of the major accomplishments in popular music. ... “Car” and “Cars” redirect here. ... The Nintendo 64 ), often abbreviated as N64, is Nintendos third home video game console for the international market. ... F-Zero X ), is a video game for the Nintendo 64 console. ... -30- (released as Deadline Midnight in the UK) is a 1959 movie starring William Conrad and Jack Webb as the editor and publisher, respectively, of a fictional Los Angeles evening newspaper. ... For other uses see film (disambiguation) Film refers to the celluliod media on which movies are printed Film — also called movies, the cinema, the silver screen, moving pictures, photoplays, picture shows, flicks, or motion pictures, — is a field that encompasses motion pictures as an art form or as... Los Angeles and L.A. redirect here. ... John Randolph Jack Webb (April 2, 1920 – December 23, 1982) was an American actor, television producer, director, and writer who is most famous for his role as Sergeant Joe Friday in the radio and television series Dragnet. ... Conrad in Cannon William Conrad (September 27, 1920 – February 11, 1994), born William Cann, was an American actor and narrator in radio, film and television noted for his gifted use of a marvelous baritone voice, as well as for his sizable girth. ... According to Erik Eriksons stages of human development, first enumerated in Childhood and Society (1950) a young adult is a person between the ages of 19 and 40, whereas an adolescent is a person between the ages of 13 and 21. ... Russell Ira Crowe (born April 7, 1964) is a New Zealand-Australian[1] actor. ... 13 Going On 30 (also known as Suddenly 30 in Australia and 13 Love 30 In Japan) is a 2004 comedy movie starring Jennifer Garner. ... Jennifer Anne Garner [1] (born April 17, 1972) is a Golden Globe Award- and SAG Award-winning and Emmy Award-nominated American film and television actress, and producer. ... Food Network is an American cable network that airs many specials and recurring (episodic) shows about food. ... A television program is the content of television broadcasting. ... 30 Minute Meals is a Food Network show hosted by Rachael Ray. ... Maurice Morning Maury Wills (born October 2, 1932 in Washington, DC) is a former Major League Baseball shortstop and switch-hitting batter who played most prominently with the Los Angeles Dodgers (1959-66, 1969-72), and also with the Pittsburgh Pirates (1967-68) and Montreal Expos (1969). ... Major league affiliations National League (1890–present) West Division (1969–present) Current uniform Retired Numbers 1, 2, 4, 19, 20, 24, 32, 39, 42, 53 Name Los Angeles Dodgers (1958–present) Brooklyn Dodgers (1932-1957) Brooklyn Robins (1914-1931) Brooklyn Dodgers (1913) Brooklyn Trolley Dodgers (1911-1912) Brooklyn Superbas (1899... Topics in Christianity Movements · Denominations · Other religions Ecumenism · Preaching · Prayer Music · Liturgy · Calendar Symbols · Art · Criticism Important figures Apostle Paul · Church Fathers Constantine · Athanasius · Augustine Anselm · Aquinas · Palamas · Luther Calvin · Wesley Arius · Marcion of Sinope Archbishop of Canterbury · Catholic Pope Coptic Pope · Ecumenical Patriarch Christianity Portal This box:      For other... This article is about Jesus of Nazareth. ... This article is about the chemical element. ... 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. ...

Historical years

30 A.D., 30 B.C., 1930, 2030, etc. Events The Sermon on the Mount (according to proponents of the 33 theory) April 7 - Crucifixion of Jesus (suggested date, but it is also suggested that he died on April 3, AD 33) Births Quintus Petillius Cerialis, brother-in-law of Vespasian Deaths April 7 - Judas Iscariot, disciple of Jesus... Octavian becomes Roman Consul for the fourth time. ... Year 1930 (MCMXXX) was a common year starting on Wednesday (link will display 1930 calendar) of the Gregorian calendar. ... 2030 (MMXXX) will be a common year starting on Tuesday of the Gregorian calendar. ...

In sports

Ryan Miller (born July 17, 1980 in East Lansing, Michigan) is an American ice hockey goaltender for the Buffalo Sabres in the NHL, wearing number 30. ... The Buffalo Sabres are a professional ice hockey team based in Buffalo, New York. ... Martin Pierre Brodeur (IPA: ) (born May 6, 1972, in Montreal, Quebec) is a professional ice hockey goaltender who has played his entire National Hockey League career with the New Jersey Devils. ... The New Jersey Devils are a professional ice hockey team based in Newark, New Jersey. ... Ko Simpson is an american football safety who currently plays for the National Football Leagues Buffalo Bills. ... For other uses, see Buffalo Bills (disambiguation). ... Ahman Rashad Green (born February 16, 1977 in Omaha, Nebraska, U.S.) is an American football running back who plays for the Houston Texans of the National Football League. ... This article is about the current National Football League team. ...


30 is an album by American artist Harry Connick, Jr. ... ‹ The template below (Taginfo) is being considered for deletion. ... 30 Seconds to Mars (or Thirty Seconds to Mars) is an alternative rock band from Los Angeles, California, featuring actor Jared Leto as the lead vocalist. ...

In Age of Empires 2

In the computer game, Age of Empires 2, when a player types the number thirty into the chat during the game lobby, or while playing a game, a voice clip of a man saying "Woo loo loo" is played. A computer game is a game composed of a computer-controlled virtual universe that players interact with in order to achieve a defined goal or set of goals. ... Age of Empires II: The Age of Kings (or simply Age of Kings) is a real-time strategy computer game set in the middle ages, released in 1999. ... A player of a game is a participant therein. ... For other uses, see Number (disambiguation). ... For other uses, see Game (disambiguation). ... The word voice can be used to refer to: Sound: The human voice. ...


  1. ^ Michael Slone, Every positive integer greater than 30 has at least one composite totative from PlanetMath. Accessed 24 April 2007

  Results from FactBites:
30 (number) - Wikipedia, the free encyclopedia (401 words)
30 is the largest number such that coprimes smaller than itself are also prime.
The Saros number of the solar eclipse series which began on -2069 October 2 and ended on -572 March 18.
Further, the Saros number of the lunar eclipse series which began on -1803 June 19 and ended on -487 August 18.
  More results at FactBites »



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