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The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... Ternary can mean: Ternary form, a form used for structuring music Ternary logic, a logic system with values true, false, and some other value Ternary numeral system, a base-3 counting system Ternary operation, an operation that takes three parameters Ternary plot or Ternary graph, a plot that shows the... Quaternary is the base four numeral system. ... Quinary (base-5) is a numeral system with five as the base. ... A senary numeral system is a base-six numeral system. ... The septenary numeral system is the base seven number system, and uses the digits 0-6. ... The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. ... Nonary is a base 9 numeral system, typically using the digits 0-8, but not the digit 9. ... The undecimal (base-11) positional notation system is based on the number eleven, rather than ten as in decimal or eight in octal and so on. ... 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 0â€“9 and Aâ€“F, or aâ€“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). ... 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. ...

Eleven is the 5th smallest prime number. It is the smallest two-digit prime number in the decimal base; as well as, of course, in undecimal (where it is the smallest two-digit number). It is also the smallest three-digit prime in ternary, and the smallest four-digit prime in binary, but a single-digit prime in bases larger than ten, such as duodecimal, hexadecimal, vigesimal and sexagesimal. 11 is the fourth Sophie Germain prime, the third safe prime, the fourth Lucas prime, and the first repunit prime. Although it is necessary for n to be prime for 2n-1 to be a Mersenne prime, the converse is not true: 211 - 1 = 2047 which is 23 × 89. The next prime is 13, with which it comprises a twin prime. 11 is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. Displayed on a calculator, 11 is a strobogrammatic prime and a dihedral prime because it reads the same whether the calculator is turned upside down or reflected on a mirror, or both. In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. ... For other uses, see Decimal (disambiguation). ... The radix (Latin for root), also called base, is the number of various unique symbols (or digits or numerals) a positional numeral system uses to represent numbers. ... The undecimal (base-11) positional notation system is based on the number eleven, rather than ten as in decimal or eight in octal and so on. ... Ternary can mean: Ternary form, a form used for structuring music Ternary logic, a logic system with values true, false, and some other value Ternary numeral system, a base-3 counting system Ternary operation, an operation that takes three parameters Ternary plot or Ternary graph, a plot that shows the... 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 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 0â€“9 and Aâ€“F, or aâ€“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). ... The sexagesimal (base-sixty) is a numeral system with sixty as the base. ... A prime number p is called a Sophie Germain prime if 2p + 1 is also prime. ... A safe prime is a prime number of the form 2p + 1, where p is also a prime. ... A Lucas prime is a Lucas number that is prime. ... In recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1. ... In mathematics, a Mersenne number is a number that is one less than a power of two. ... In logic, if S is a statement of the form P implies Q, then the converse of S is a statement of the form Q implies P. In general, the verity of S says nothing about the verity of its converse. ... 13 (thirteen) is the natural number following 12 and preceding 14. ... A twin prime is a prime number that differs from another prime number by two. ... An Eisenstein prime is an Eisenstein integer aÏ‰ + b that has only two Eisenstein divisors, the complex cube root of unity and aÏ‰ + b itself. ... A strobogrammatic prime is a prime number that, given a base and given a set of glyphs, appears the same whether viewed normally or upside down. ... A dihedral prime or dihedral calculator prime is a prime number that still reads like itself or another prime number when read in a seven-segment display, regardless of orientation (normally or upside down), and surface (actual display or reflection on a mirror). ...

Because it has a reciprocal of unique period length among primes, 11 is the second unique prime. 11 goes into 99 exactly 9 times, so vulgar fractions with 11 in the denominator have two digit repeating sequences in their decimal expansions. Multiples of eleven by one-digit numbers all have double digits: 00 (=0), 11, 22, 33, 44 . . . In mathematics, a unique prime is a certain kind of prime number. ... In arithmetic, a vulgar fraction (or common fraction) consists of one integer divided by a non-zero integer. ... A denominator is a name. ... In mathematics and computer science, a numerical digit is a symbol, e. ... For other uses, see Decimal (disambiguation). ...

An eleven-sided polygon is called a hendecagon or undecagon. Look up polygon in Wiktionary, the free dictionary. ... Categories: Math stubs | Polygons ... Categories: Math stubs | Polygons ...

In both base 6 and base 8, the smallest prime with a composite sum of digits is 11.

In base 10, there is a simple test to determine if an integer is divisible by 11: take every digit of the number located in odd position and add them up, then take the remaining digits and add them up. If the difference between the two sums is a multiple of 11, including 0, then the number is divisible by 11. For instance, if the number is 65,637 then (6 + 6 + 7) - (5 + 3) = 19 - 8 = 11, so 65,637 is divisible by eleven. This technique also works with groups of digits rather than individual digits, so long as the number of digits in each group is odd, although not all groups have to have the same number of digits. For instance, if one uses three digits in each group, one gets from 65,637 the calculation (065) - 637 = -572, which is divisible by eleven.

Another test for divisibility is to separate a number into groups of two consecutive digits (adding a leading zero if there is an odd number of digits), and then add up the numbers so formed; if the result is divisible by eleven, the number is divisible by eleven. For instance, if the number is 65,637, 06 + 56 + 37 = 99, which is divisible by eleven, so 65,637 is divisible by eleven. This also works by adding a trailing zero instead of a leading one: 65 + 63 + 70 = 198, which is divisible by eleven. This also works with larger groups of digits, providing that each group has an even number of digits (not all groups have to have the same number of digits).

An easy way of multiplying numbers by 11 in base 10 is: If the number has: In its simplest form, multiplication is a quick way of adding identical numbers. ...

• 1 digit - Replicate the digit (so 2 x 11 becomes 22).
• 2 digits - Add the 2 digits together and place the result in the middle (so 47 x 11 becomes 4 (11) 7 or 4 (10+1) 7 or (4+1) 1 7 or 517).
• 3 digits - Keep the first digit in its place for the result's first digit, add the first and second digits together to form the result's second digit, add the second and third digits together to form the result's third digit, and keep the third digit as the result's fourth digit. For any resulting numbers greater than 9, carry the 1 to the left. Example 1: 123 x 11 becomes 1 (1+2) (2+3) 3 or 1353. Example 2: 481 x 11 becomes 4 (4+8) (8+1) 1 or 4 (10+2) 9 1 or (4+1) 2 9 1 or 5291.
• 4 or more digits - Follow the same pattern as for 3 digits.

In base 10, 11 is the only integer that is not a Nivenmorphic 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 base thirteen and higher bases (such as hexadecimal), eleven is represented as B, where ten is A. In duodecimal, however, eleven is sometimes represented as E and ten as T. 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 0â€“9 and Aâ€“F, or aâ€“f. ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ...

Multiplied by −1, eleven is a Heegner number. In mathematics, &#8722;1 is the integer greater than negative two (&#8722;2) and less than 0. ... In number theory, a Heegner number is a positive integer n such that the quadratic field Q(&#8730;-n) has class number 1. ...

There are 11 orthogonal curvilinear coordinate systems (to within a conformal symmetry) in which the 3-variable Helmholtz equation can be solved using the separation of variables technique. See Cartesian coordinate system or Coordinates (elementary mathematics) for a more elementary introduction to this topic. ... The Helmholtz equation, named for Hermann von Helmholtz, is the elliptic partial differential equation where is the Laplacian, is a constant, and the unknown function is defined on three-dimensional Euclidean space R3. ... In mathematics, separation of variables is any of several methods for solving ordinary and partial differential equations, in which algebra allows one to re-write an equation so that each of two variables occurs on a different side of the equation. ...

See also 11-cell. In mathematics, the 11-cell is a four-dimensional self-dual abstract regular polytope. ...

### 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 25 50 100 1000
$11 times x$ 11 22 33 44 55 66 77 88 99 110 121 132 143 154 165 176 187 198 209 220 231 242 275 550 1100 11000
Division 1 2 3 4 5 6 7 8 9 10
11 12 13 14 15
$11 div x$ 11 5.5 $3.overline{6}$ 2.75 2.2 $1.8overline{3}$ $1.overline{571428}$ 1.375 $1.overline{2}$ 1.1
1 $0.91overline{6}$ $0.overline{8}4615overline{3}$ $0.7overline{8}5714overline{2}$ $0.7overline{3}$
$x div 11$ $0.overline{09}$ $0.overline{18}$ $0.overline{27}$ $0.overline{36}$ $0.overline{45}$ $0.overline{54}$ $0.overline{63}$ $0.overline{72}$ $0.overline{81}$ $0.overline{90}$
$1.overline{09}$ $1.overline{18}$ $1.overline{27}$ $1.overline{36}$ $1.overline{45}$
Radix 1 5 10 15 20 25 30 40 50 60 70 80 90 100
110 120 130 140 150 200 250 500 1000 10000 100000 1000000
$x_{11}$ 1 5 $A_{11}$ $14_{11}$ $19_{11}$ $23_{11}$ $28_{11}$ $37_{11}$ $46_{11}$ $55_{11}$ $64_{11}$ $73_{11}$ $82_{11}$ $91_{11}$
$A0_{11}$ $AA_{11}$ $109_{11}$ $118_{11}$ $127_{11}$ $172_{11}$ $208_{11}$ $415_{11}$ $82A_{11}$ $7572_{11}$ $6914_{11}$ $623351_{11}$

### List of basic operations that make 11

+ − $times$ $div$ $0 + 11$ $0 - (-11)$ N/A N/A $1 + 10$ $1 - (-10)$ $1 times 11$ $1 div 0.overline{0}overline{9}$ $2 + 9$ $2 - (-9)$ $2 times 5.5$ $2 div 0.overline{1}overline{8}$ $3 + 8$ $3 - (-8)$ $3 times 3.overline{6}$ $3 div 0.overline{2}overline{7}$ $4 + 7$ $4 - (-7)$ $4 times 2.75$ $4 div 0.overline{3}overline{6}$ $5 + 6$ $5 - (-6)$ $5 times 2.2$ $5 div 0.overline{4}overline{5}$ $6 + 5$ $6 - (-5)$ $6 times 1.8overline{3}$ $6 div 0.overline{5}overline{4}$ $7 + 4$ $7 - (-4)$ $7 times 1.overline{5}overline{7}overline{1}overline{4}overline{2}overline{8}$ $7 div 0.overline{6}overline{3}$ $8 + 3$ $8 - (-3)$ $8 times 1.375$ $8 div 0.overline{7}overline{2}$ $9 + 2$ $9 - (-2)$ $9 times 1.overline{2}$ $9 div 0.overline{8}overline{1}$ $10 + 1$ $10 - (-1)$ $10 times 1.1$ $10 div 0.overline{9}overline{0}$ $11 + 0$ $11 - 0$ $11 times 1$

## 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. ... For sodium in the diet, see Edible salt. ... For other uses, see Copper (disambiguation). ... This article is about the chemical element. ... GOLD refers to one of the following: GOLD (IEEE) is an IEEE program designed to garner more student members at the university level (Graduates of the Last Decade). ... For other uses of this term, see Spacetime (disambiguation). ... 2-dimensional renderings (ie. ... M-theory is a solution proposed for the unknown theory of everything which would combine all five superstring theories and 11-dimensional supergravity together. ...

### Astronomy

• The Saros number of the solar eclipse series which began on -2511 December 26 and ended on -1158 March 18. The duration of Saros series 11 was 1352.2 years, and it contained 76 solar eclipses.
• The Saros number of the lunar eclipse series which began on -2389 June 19 and ended on -1037 September 8. The duration of Saros series 11 was 1352.2 years, and it contained 76 lunar eclipses.
• The 11th moon of Jupiter is Himalia.have a lot with the number 11 it is the best number in the world

## In music

• The interval of an octave and a fourth is an eleventh. A complete eleventh chord has almost every note of a diatonic scale.
• The number of thumb keys on a bassoon, not counting the whisper key. (A few bassoons have a twelfth thumb key.)
• The band Primus has a song "Eleven" on their Album Sailing the Seas of Cheese.
• The band Tool has a song "jimmy" on their Album Ænima which includes many instances of the number eleven.
• Spinal Tap's amplifiers go up to eleven, every other bands' just go to ten, but it doesn't actually amplify the sound any greater.
• Maria Taylor's Debut solo album is entitled 11:11
• The All-American Rejects have a song on the CD Move Along that is called 11:11
• Andrew Bird has a song called 11:11

For other uses, see Octave (disambiguation). ... In music theory, a diatonic scale (from the Greek diatonikos, to stretch out; also known as the heptatonia prima; set form 7-35) is a seven-note musical scale comprising five whole-tone and two half-tone steps, in which the half tones are maximally separated. ... The bassoon is a woodwind instrument in the double reed family that typically plays music written in the bass and tenor registers and occasionally even higher. ... For other uses, see Primus. ... Sailing the Seas of Cheese is the second album by Primus, released on May 14, 1991. ... Tool is a Grammy-award winning American rock band, formed in 1990 in Los Angeles, California. ... Ã†nima is the second full-length studio album by the American rock band Tool. ... For other uses, see Spinal Tap (disambiguation). ... Andrew Bird (born July 11, 1973) is an American musician, songwriter, and multi-instrumentalist. ...

## In sports

There are eleven players on a soccer team on the field at a time as well as in a cricket team. Within a school or college, the phrases "the football XI" and "the cricket XI" generally refer to the first (best) team currently playing. Other teams are often referred to as "the second XI" etc. A player (wearing the red kit) has penetrated the defence (in the white kit) and is taking a shot at goal. ... Bowler Shaun Pollock bowls to batsman Michael Hussey. ...

Also in soccer, in the German language (and possibly others, in countries that predominantly use the metric system) a penalty kick is referred to as "Elfmeter" because the penalty spot is approximately 11m (precisely 12 yards) from the goal line. A player (wearing the red kit) has penetrated the defence (in the white kit) and is taking a shot at goal. ...

In cricket, 11 is the number of players from the fielding (or bowling) side on the field of play at any one time.

An American football team also has eleven players on the field at one time during play. United States simply as football, is a competitive team sport that is both fast-paced and strategic. ...

The car number of Darrell Waltrip and Cale Yarborough when they won their NASCAR Winston Cup Series championships. Denny Hamlin now drives a car with this number. Darrell Lee Waltrip (born February 5, 1947 in Owensboro, Kentucky) is a three-time former NASCAR Winston Cup champion, the 1989 Daytona 500 winner, and current television race commentator with Fox Broadcasting Company. ... William Caleb Cale Yarborough (born March 27, 1939 in Timmonsville, South Carolina, near the Famous Darlington Raceway), is a former NASCAR Winston Cup Series driver and was one of the series engaging personalities. ... Jeff Burton (99), Elliott Sadler (38), Ricky Rudd (21), Dale Jarrett (88), Sterling Marlin (40), Jimmie Johnson (48), and Casey Mears (41) practice for the 2004 Daytona 500 The National Association for Stock Car Auto Racing (NASCAR) is the largest sanctioning body of motorsports in the United States. ... NASCAR Nextel Cup logo The NASCAR NEXTEL Cup Series is NASCARs top racing series. ... Denny Hamlin is a race car driver currently contracted to Joe Gibbs Racing. ...

In rugby union the left wing wears the 11 shirt. For other uses, see Rugby (disambiguation). ...

Traditionally, a left wing midfielder in football wears number 11. Less commonly, it is worn by strikers.Jonah Lomu wore the number when he played for the All Blacks as he played left wing (see rugby union above). The Midfield in relation to the football positions In association football, a midfielder is a player whose position of play is midway between the attacking strikers and the defenders (highlighted in blue on the diagram). ... Strikers, also known as forwards and attackers, and formerly inside forwards, are the players on a team in football in the row nearest to the opposing teams goal, who are therefore principally responsible for scoring goals. ... Jonah Tali Lomu, MNZM (born May 12, 1975) is a New Zealand rugby union footballer who has played 73 times (63 caps) as an All Black after debuting in 1994. ... First international  Australia 3 - 22 New Zealand  (15 August 1903) Largest win  New Zealand 145 - 17 Japan  (4 June 1995) Worst defeat  Australia 28 - 7 New Zealand  (28 August 1999) World Cup Appearances 6 (First in 1987) Best result Champions, 1987 The All Blacks are New Zealands national rugby...

11 is also by quarterbacks, kickers, punter and wide receivers in American football's NFL. The only NFL team that has retired the #11 is the New York Giants, in honor of quarterback Phil Simms. Navy quarterback Aaron Polanco sets up to throw. ... An amateur place kicker attempts to kick a field goal Placekicker, or simply Kicker, is the title of the player in American and Canadian football who is responsible for the kicking duties of field goals, extra points, and, in many cases, kickoffs. ... [[Image:|frame|right|Todd Sauerbrun punts the ball for the Carolina Panthers. ... The wide receiver (WR) position in American and Canadian football is the pass-catching specialist. ... United States simply as football, is a competitive team sport that is both fast-paced and strategic. ... NFL logo For other uses of the abbreviation NFL, see NFL (disambiguation). ... Phillip Martin Simms (born November 3, 1955, in Lebanon, Kentucky) is a former American football quarterback, and currently a television sportscaster for the CBS network. ...

## In the military

This article does not cite any references or sources. ... The United States Army is the largest and oldest branch of the armed forces of the United States. ... â€œThe U.S. Air Forceâ€ redirects here. ... USN redirects here. ... USCG HH-65 Dolphin USCG HH-60J JayHawk The United States Coast Guard (USCG) is at all times a branch of the United States armed forces a maritime law enforcement agency, and a federal regulatory body. ... A Military Occupational Specialty (MOS) is a job classification in use in the United States Army and Marine Corps. ... The United States Marine Corps (USMC) is a branch of the United States military responsible for providing power projection from the sea,[1] utilizing the mobility of the U.S. Navy to rapidly deliver combined-arms task forces. ... â€œThe Great War â€ redirects here. ... Front page of the New York Times on Armistice Day, 11 November 1918 The armistice treaty between the Allies and Germany was signed in a railway carriage in CompiÃ¨gne Forest on November 11, 1918, and marked the end of the First World War on the Western Front. ... 1918 (MCMXVIII) was a common year starting on Tuesday of the Gregorian calendar (see link for calendar) or a common year starting on Wednesday of the Julian calendar. ... Armistice Day Celebrations in Toronto, Canada - 1918 Armistice Day is the anniversary of the official end of World War I, November 11, 1918. ... is the 315th day of the year (316th in leap years) in the Gregorian calendar. ... There are 24. ... Wreaths of artificial poppies used as a symbol of remembrance Remembrance Day (Australia, Canada, United Kingdom), also known as Poppy Day (Malta and South Africa), Veterans Day (United States), and Armistice Day (France, New Zealand, and many other Commonwealth countries; and the original name of the day internationally) is a... The Commonwealth of Nations as of 2006 Headquarters Marlborough House, London, UK Official languages English Membership 53 sovereign states Leaders  -  Queen Elizabeth II  -  Secretary-General Don McKinnon (since 1 April 2000) Establishment  -  Balfour Declaration 18 November 1926   -  Statute of Westminster 11 December 1931   -  London Declaration 28 April 1949  Area  -  Total...

## In technology

Firefox redirects here. ... Opera is an Internet suite which handles common internet-related tasks, including visiting web sites, sending and receiving e-mail messages, managing contacts, and online chat. ... Konqueror is a file manager, web browser and file viewer, which was developed as part of the K Desktop Environment (KDE) by volunteers and runs on most Unix-like operating systems. ... KDE (K Desktop Environment) (IPA: ) is a free software project which aims to be a powerful system for an easy-to-use desktop environment. ... Windows Internet Explorer (formerly Microsoft Internet Explorer abbreviated MSIE), commonly abbreviated to IE, is a series of proprietary graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems starting in 1995. ... A function key is a key on a computer or terminal keyboard which can be programmed so as to cause an operating system command interpreter or application program to perform certain actions. ... Mac OS X (IPA: ) is a line of graphical operating systems developed, marketed, and sold by Apple Inc. ... Filiation of Unix and Unix-like systems Unix (officially trademarked as UNIXÂ®, sometimes also written as or Â® with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy. ... In computing, the X Window System (commonly X11 or X) is a windowing system for bitmap displays. ...

• The stylized maple leaf on the Flag of Canada has eleven points.
• The Canadian one-dollar coin is a hendecagon, an eleven-sided polygon.
• Clocks depicted on Canadian currency, for example the Canadian fifty-dollar bill, show 11:00.
• Eleven denominations of Canadian currency are produced in large quantities.
• Due to Canada's federal nature, eleven legally distinct Crowns effectively exist in the country, with the Monarch being represented separately in each province, as well as at the federal level.

## Historical years

11 A.D., 11 B.C., 1911, 2011, etc. This article is about the year 11. ... Centuries: 2nd century BC - 1st century BC - 1st century Decades: 60s BC 50s BC 40s BC 30s BC 20s BC - 10s BC - 0s 10s 20s 30s 40s Years: 16 BC 15 BC 14 BC 13 BC 12 BC 11 BC 10 BC 9 BC 8 BC 7 BC 6 BC... Year 1911 (MCMXI) was a common year starting on Sunday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Saturday of the 13-day-slower Julian calendar). ... 2011 (MMXI) will be a common year starting on Saturday of the Gregorian calendar. ...

• 11:11
• 11:11 (numerology)

Results from FactBites:

 11 (number) - definition of 11 (number) in Encyclopedia (614 words) 11 goes into 99 exactly 9 times, so fractions with 11 in the denominator have two digit repeating sequences in their decimal expansions. The number eleven is important in numerology, as it is the first of the master numbers. The number of guns in a gun salute to U.S. Army, Air Force and Marine Corps Brigadier Generals, and to Navy and Coast Guard Rear Admirals Lower Half.
 Reference.com/Encyclopedia/11 (number) (727 words) 11 goes into 99 exactly 9 times, so vulgar fractions with 11 in the denominator have two digit repeating sequences in their decimal expansions. The Saros number of the solar eclipse series which began on -2511 December 26 and ended on -1158 March 18. The Saros number of the lunar eclipse series which began on -2389 June 19 and ended on -1037 September 8.
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