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8

0 1 2 3 4 5 6 7 8 9 →

0 10 20 30 40 50 60 70 80 90 →
Cardinal 8
eight
Ordinal 8th
eighth
Numeral system octal
Factorization 23
Divisors 1, 2, 4, 8
Roman numeral VIII
Roman numeral (Unicode) Ⅷ, ⅷ
Arabic ٨
Amharic ፰
Bengali ৮
Chinese numeral 八
Devanāgarī ८
Hebrew ח (Het)
Khmer ៨
Thai ๘
prefixes octa-/oct- (from Greek)

octo-/oct- (from Latin)
Binary 1000
Octal 10
Duodecimal 8
Hexadecimal 8

8 (eight) is the natural number following 7 and preceding 9. Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity In mathematics Two has many properties in Mathematics. An Integer is called Even if it is divisible by 2 ---- In mathematics Three is the first odd Prime number, and the second smallest prime In mathematics Four is the smallest Composite number, its proper Divisors being and. This article discusses the number five. For the year 5 AD see 5. In mathematics Six is the second smallest Composite number, its proper Divisors being 1, 2 and 3. In mathematics Seven is the fourth Prime number. It is not only a Mersenne prime (since 23 &minus 1 = 7 but also a In mathematics Nine is a Composite number, its proper Divisors being 1 and 3. This is a list of articles about Numbers ( not about Numerals. The integers (from the Latin integer, literally "untouched" hence "whole" the word entire comes from the same origin but via French "Twenty" redirects here For the village in England, see Twenty Lincolnshire. 30 ( thirty) is the Natural number following 29 and preceding 31. 40 ( forty) is the Natural number following 39 and preceding 41. This article discusses the number fifty. For the year 50 CE see 50. 60 ( sixty) is the Natural number following 59 and preceding 61. 70 ( seventy) is the Natural number following 69 and preceding 71. 80 ( eighty) is the Natural number following 79 and preceding 81. 90 ( ninety) is the Natural number preceded by 89 and followed by 91. This article describes cardinal numbers in mathematics For cardinals in linguistics see Names of numbers in English. In linguistics ordinal numbers are the words representing the rank of a number with respect to some order in particular order or position (i A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner The octal Numeral system, or oct for short is the base -8 number system and uses the digits 0 to 7 In Mathematics, factorization ( also factorisation in British English) or factoring is the decomposition of an object (for In Mathematics, a divisor of an Integer n, also called a factor of n, is an integer which evenly divides n without Roman numerals are a Numeral system originating in ancient Rome, adapted from Etruscan numerals. Arabic (ar الْعَرَبيّة (informally ar عَرَبيْ) in terms of the number of speakers is the largest living member of the Semitic language Amharic (አማርኛ amarəñña) is a Semitic language spoken in North Central Ethiopia by the Amhara. Chinese numerals are characters for writing Numbers in Chinese. Khmer numerals are the numerals used in the Khmer language of Cambodia. Thai numerals (เลขไทย are a set of numerals traditionally used in Thailand, although the Arabic numerals are more common Numerical prefixes are usually derived from the words for numbers in various languages most commonly Greek and Latin, although this is not always the case Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. 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 system (also known as base -12 or dozenal) is a Numeral system using twelve as its base. In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a In Mathematics, a natural number (also called counting number) can mean either an element of the set (the positive Integers or an In mathematics Seven is the fourth Prime number. It is not only a Mersenne prime (since 23 &minus 1 = 7 but also a In mathematics Nine is a Composite number, its proper Divisors being 1 and 3. The SI prefix for 10008 is yotta (Y), and for its reciprocal yocto (y). An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol to form a Decimal multiple or

Contents

In mathematics

8 is a composite number, its proper divisors being 1, 2, and 4. 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 Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity In mathematics Two has many properties in Mathematics. An Integer is called Even if it is divisible by 2 In mathematics Four is the smallest Composite number, its proper Divisors being and. Eight is a power of two, being 23, or two cubed. In Mathematics, a power of two is any of the Integer powers of the number two; in other words two multiplied by itself a certain It has an aliquot sum of 7. In Mathematics, and specifically in Number theory, a divisor function is an Arithmetical function related to the Divisors of an Integer In mathematics Seven is the fourth Prime number. It is not only a Mersenne prime (since 23 &minus 1 = 7 but also a All powers of 2 have an aliquot sum of one less than themselves.

8 is the base of the octal number system, which is mostly used with computers. The octal Numeral system, or oct for short is the base -8 number system and uses the digits 0 to 7 A computer is a Machine that manipulates data according to a list of instructions. In octal, one digit represents 3 bits. A bit is a binary digit, taking a value of either 0 or 1 Binary digits are a basic unit of Information storage and communication In modern computers, a byte is a grouping of eight bits, also called an octet. A byte (pronounced "bite" baɪt is the basic unit of measurement of information storage in Computer science.

The number 8 is a Fibonacci number, being 3 plus 5. In Mathematics, the Fibonacci numbers are a Sequence of numbers named after Leonardo of Pisa, known as Fibonacci ---- In mathematics Three is the first odd Prime number, and the second smallest prime This article discusses the number five. For the year 5 AD see 5. The next Fibonacci number is 13.

8 and 9 form a Ruth-Aaron pair under the second definition in which repeated prime factors are counted as often as they occur. In Mathematics, a Ruth-Aaron pair consists of two Consecutive integers (e

A polygon with eight sides is an octagon. In Geometry a polygon (ˈpɒlɨɡɒn ˈpɒliɡɒn is traditionally a plane figure that is bounded by a closed path or circuit Regular octagons A regular octagon is an octagon whose sides are all the same length and whose internal angles are all the same size Figurate numbers representing octagons (including eight) are called octagonal numbers. A figurate number is a number that can be represented as a regular and discrete geometric pattern (e An octagonal number is a Figurate number that represents an Octagon. A polyhedron with eight faces is an octahedron. What is a polyhedron? We can at least say that a polyhedron is built up from different kinds of element or entity each associated with a different number of dimensions An octahedron (plural octahedra is a Polyhedron with eight faces

Sphenic numbers always have exactly eight divisors. In Mathematics, a sphenic number ( Old Greek sphen = Wedge) is a positive integer which is the product of three distinct Prime

8 is the dimension of the octonions and is the highest possible dimension of a normed division algebra. In Mathematics, the octonions are a nonassociative extension of the Quaternions Their 8-dimensional Normed division algebra over the Real In Mathematics, a normed division algebra A is a Division algebra over the real or complex numbers which is also a Normed vector

The number 8 is involved with a number of interesting mathematical phenomena related to the notion of Bott periodicity. In Mathematics, the Bott periodicity theorem is a result from Homotopy theory discovered by Raoul Bott during the latter part of the 1950s which proved For example if O(\infty) is the direct limit of the inclusions of real orthogonal groups O(1)\hookrightarrow O(2)\hookrightarrow\ldots\hookrightarrow O(k)\hookrightarrow\ldots then \pi_{k+8}(O(\infty))\cong\pi_{k}(O(\infty)). Clifford algebras also display a periodicity of 8. For example the algebra Cl(p + 8,q) is isomorphic to the algebra of 16 by 16 matrices with entries in Cl(p,q). We also see a period of 8 in the K theory of spheres and in the representation theory of the rotation groups, the latter giving rise to the 8 by 8 spinorial chessboard. In Mathematics, K-theory is a tool used in several disciplines In the mathematical field of Representation theory, group representations describe abstract groups in terms of Linear transformations of This article is about rotations in three-dimensional Euclidean space All of these properties are closely related to the properties of the octonions. In Mathematics, the octonions are a nonassociative extension of the Quaternions Their 8-dimensional Normed division algebra over the Real

The lowest dimensional even unimodular lattice is the 8-dimensional E8 lattice. In Mathematics, a unimodular lattice is a lattice of Discriminant 1 or &minus1 Even positive definite unimodular lattice exist only in dimensions divisible by 8.

A figure 8 is the common name of a geometric shape, often used in the context of sports, such as skating

In binary code eight is 1000; in ternary code eight is 22; in quaternary numeral system code eight is 20; in quinary eight is 13; in senary eight is 12; in septenary eight is 11; in octal eight is 10; in novenary code and all codes above (such as decimal and hexadecimal) eight is 8. Geometry ( Greek γεωμετρία; geo = earth metria = measure is a part of Mathematics concerned with questions of size shape and relative position The shape ( OE sceap Eng created thing) of an object located in some space refers to the part of space occupied by the object as determined 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 or trinary is the base - Numeral system. Analogous to a " Bit " a ternary digit is known as a trit ( Quaternary is the base - Numeral system. It uses the digits 0 1 2 and 3 to represent any Real number. A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner Quinary ( base -) is a Numeral system with five as the base This originates from the five Fingers on either Hand. In Mathematics, a senary Numeral system is a base - numeral system The septenary Numeral system is the base - 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 - Numeral system, typically using the digits 0-8 but not the digit 9 The decimal ( base ten or occasionally denary) Numeral system has ten as its base. In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a

A fallen or lying down 8 (∞, the lemniscate) is used to represent infinity in mathematics. Infinity (symbolically represented with ∞) comes from the Latin infinitas or "unboundedness In Algebraic geometry, the word lemniscate refers to any of several figure-eight or ∞ shaped curves of which the best known is the Lemniscate of Bernoulli This interpretation of 8 may be related to the representation of the caduceus (where two snakes form several figure eights) as stability or balance of opposing forces. The caduceus (/kəˈdjuːsiəs/ -ʃəs -ˈduː- κηρύκειον in Greek) or wand of Hermes is typically depicted as a short herald's staff

Eight is the number of Thurston model geometries. Eight is not a prime number

E8 has rank 8.

As of 2008, there are only eight known Stern primes. A Stern prime, named for Moritz Abraham Stern, is a Prime number that is not the sum of a smaller prime and twice the square of a nonzero Integer

In numeral systems

Base Numeral system
2 binary 1000
3 ternary 22
4 quaternary 20
5 quinary 13
6 senary 12
7 septenary 11
8 octal 10
over 8 (decimal, hexadecimal) 8

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
8 \times x 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160 168 176 184 192 200 400 800 8000
Division 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
8 \div x 8 4 2.\overline{6} 2 1. In mathematical numeral systems, the base or radix is usually the number of unique digits, including zero that a positional Numeral A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner 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 or trinary is the base - Numeral system. Analogous to a " Bit " a ternary digit is known as a trit ( Quaternary is the base - Numeral system. It uses the digits 0 1 2 and 3 to represent any Real number. Quinary ( base -) is a Numeral system with five as the base This originates from the five Fingers on either Hand. In Mathematics, a senary Numeral system is a base - numeral system The septenary Numeral system is the base - 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 The decimal ( base ten or occasionally denary) Numeral system has ten as its base. In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a 24 ( twenty-four) is the Natural number following 23 and preceding 25. 32 ( thirty-two) is the Natural number following 31 and preceding 33. 40 ( forty) is the Natural number following 39 and preceding 41. 48 ( forty-eight) is the Natural number following 47 and preceding 49. 56 ( fifty-six) is the Natural number following 55 and preceding 57. 64 ( sixty-four) is the Natural number following 63 and preceding 65. 72 ( seventy-two) is the Natural number following 71 and preceding 73. 80 ( eighty) is the Natural number following 79 and preceding 81. 88 ( eighty-eight) is the Natural number following 87 and preceding 89. For the Australian TV series see Number 96 (TV series 96 ( ninety-six) is the Natural number following 95 and preceding 97 In mathematics 184 is the sum of four consecutive primes (41 + 43 + 47 + 53 192 is the natural number between 191 and 193. In mathematics 192 is the sum of ten consecutive primes (5 + 7 + 11 + 13 + 17 + 200 ( two hundred) is the Natural number following 199 and preceding 201. 400 ( four hundred) is the Natural number following three hundred ninety-nine and preceding four hundred one 800 ( eight hundred) is the Natural number following 799 and preceding 801 8000 ( eight thousand) is the Natural number following 7999 and preceding 8001 In Mathematics, especially in elementary Arithmetic, division is an arithmetic operation which is the inverse of Multiplication. 6 1.\overline{3} 1.\overline{142857} 1 0.\overline{8} 0. In mathematics Six is the second smallest Composite number, its proper Divisors being 1, 2 and 3. 8 0.\overline{72} 0.\overline{6} 0.\overline{615384} 0.\overline{571428} 0.5\overline{3}
x \div 8 0. 125 0. 25 0. 25 ( twenty-five) is the Natural number following 24 and preceding 26. 375 0. This article is about the number 300 as well as the integers which follow it up to 399 5 0. 625 0. 75 0. 75 ( seventy-five) is the Natural number following 74 and preceding 76. 875 1 1. 125 1. 25 1. 375 1. 5 1. 625 1. 75 1. 875
Exponentiation 1 2 3 4 5 6 7 8 9 10 11 12 13
8 ^ x\, 8 64 512 4096 32768 262144 2097152 16777216 134217728 1073741824 8589934592 68719476736 549755813888
x ^ 8\, 1 256 6561 65536 390625 1679616 5764801 16777216 43046721 100000000 214358881 429981696 815730721
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_{8} \ 1 5 12_{8} \ 17_{8} \ 24_{8} \ 31_{8} \ 36_{8} \ 50_{8} \ 62_{8} \ 74_{8} \ 106_{8} \ 120_{8} \ 132_{8} \ 144_{8} \
156_{8} \ 170_{8} \ 202_{8} \ 214_{8} \ 226_{8} \ 310_{8} \ 372_{8} \ 764_{8} \ 1750_{8} \ 23420_{8} \ 303240_{8} \ 3641100_{8} \

Evolution of the glyph

In the beginning, various groups in India wrote eight more or less in one stroke as a curve that looks like an uppercase H with the bottom half of the left line and the upper half of the right line removed. 500 ( five hundred) is the Natural number following 499 and preceding 501. 256 (two hundred fifty-six CCLVI is the natural number following 255 and preceding 257. In mathematical numeral systems, the base or radix is usually the number of unique digits, including zero that a positional Numeral At one point this glyph came close to looking like our modern five. With the western Ghubar Arabs, the similarity of the glyph to five was banished by connecting the beginning and the end of stroke together, and it was only a matter of the Europeans rounding the glyph that led to our modern eight. [1]

Just as in most modern typefaces, in typefaces with text figures the 8 character usually has an ascender, as, for example, in Image:TextFigs148.png. In Typography, a typeface is a set of one or more Fonts designed with stylistic unity each comprising a coordinated set of Glyphs A typeface usually comprises Text figures (also known as non-lining, lowercase, old-style, ranging or hanging figures or numerals are numerals Typography, an ascender is the portion of a letter in a Latin-derived alphabet that extends above the Mean line of a font. The "1" and "4" are old-style figures; the "8" is the same height in both old-style and modern figures. 1234567890 are all the same height; they are modern figures.

In science

Physics

Astronomy

Chemistry

Biology

Architecture and engineering

In religion

In superstition and divination


As a lucky or unlucky number

In astrology

In music

In sports

In football, the number 8 has historically been the number of the Central Midfielder while in rugby union the number eight central back row position wears the 8 shirt. Eight Seconds was a pop band formed in 1982 in Ottawa, Canada. Association football, more commonly known as football or soccer, is a Team sport played between two teams of eleven players and is widely considered Overview See also Playing rugby union A rugby union match lasts for 80 minutes (plus stoppage time with a short A Rugby union team is made up of 15 players eight forwards numbered from 1 to 8 and seven backs numbered from 9 to 15 Similarly in baseball, in its numbering system used to record defensive plays, eight represents the center fielder's position. Baseball is a Bat-and-ball Sport played between two teams of nine players each A center fielder, abbreviated CF, is the Outfielder in Baseball who plays defense in center field - the baseball fielding position The Philadelphia Flyers once had a line called the Crazy Eights with Eric Lindros at center (88); Mark Recchi (8); and Brent Fedyk (18). The Philadelphia Flyers are a professional Ice hockey team based in Philadelphia, Pennsylvania. Crazy Eights is a Card game for two to seven players The object of the game is to be the first to get rid of all the player's cards to a discard pile Eric Bryan Lindros (born 28 February 1973 in London, Ontario, Canada) is a retired professional Ice hockey player Mark Recchi (born February 1 1968 in Kamloops, Canada) is a Canadian professional Ice hockey player for the Tampa Bay Lightning Brent Fedyk (born March 3, 1967 in Yorkton, Saskatchewan, Canada) is a retired Canadian professional Ice hockey right winger Kobe Bryant wore this number for most parts of his career. Kobe Bean Bryant (born) is an American All-Star Shooting guard 49ers Quarterback Steve Young wore this number. In chess, each side has eight pawns and the board is made of 64 squares arranged in an eight by eight lattice. Chess is a recreational and competitive Game played between two players. The eight queens puzzle is a challenge to arrange eight queens on the board so that none can capture any of the others. The eight queens puzzle is the problem of putting eight Chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess

Eight ball billiards is played with 15 balls; the black ball numbered 8 being the middle and most important one. Eight-ball, sometimes called stripes and solids and more rarely bigs and littles or highs and lows, is a Pocket billiards (pool game popular Magic 8 Ball is a randomized process of predicting the future or answering various questions, packaged to resemble this ball and often sold as a fortune-telling device. The Magic 8-Ball, manufactured by Mattel, is a Toy used for Fortune-telling.

In rowing an 'eight' refers to a sweep oar boat with eight rowers plus a coxswain. GB coxless pair of Toby Garbett & Rick Dunn at Henley Royal Regatta 2004 The coxswain (ˈkɒksən is the person in charge of a Boat, particularly its navigation and steering

In rugby union, the only position without a proper name is the Number 8, a forward position. Overview See also Playing rugby union A rugby union match lasts for 80 minutes (plus stoppage time with a short A Rugby union team is made up of 15 players eight forwards numbered from 1 to 8 and seven backs numbered from 9 to 15

It is the retired jersey number of Baseball Hall of Fame players Cal Ripken, Jr., Joe Morgan, Willie Stargell, Carl Yastrzemski, and Yogi Berra. Joe Leonard Morgan (born September 19, 1943 in Bonham Texas) is a former Major League Baseball Second baseman who was inducted into Wilver Dornell "Willie" Stargell ( March 6, 1940 &ndash April 9, 2001) nicknamed " Pops " in the later years of Carl Michael Yastrzemski (jəˈstrɛmski (born August 22, 1939) nicknamed "Yaz" then moved him to the Minneapolis Millers for the post-season Lawrence Peter "Yogi" Berra (born May 12 1925 in St Louis Missouri) is a former Major League Baseball player and manager

8 is also the record number of goals conceded by a soccer team in the Champions League. Liverpool FC defeated Besiktas JK 8-0 at Anfield Road on November 6, 2007. Liverpool Football Club are an English professional Association football club based in Liverpool England. Beşiktaş Jimnastik Kulübü (commonly Beşiktaş, bɛʃɪktɑːʃ ( English: Beşiktaş Gymnastics Club) is a professional Sports club Besiktas JK is therefore sometimes referred to as 8esiktas. Beşiktaş Jimnastik Kulübü (commonly Beşiktaş, bɛʃɪktɑːʃ ( English: Beşiktaş Gymnastics Club) is a professional Sports club

In technology

In measurement

In foods

In literature

In slang

In other fields

International maritime signal flag for 8
International maritime signal flag for 8
Four playing cards showing the "8" of all four suits
Four playing cards showing the "8" of all four suits

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): 395, Fig. 24. 68

External links

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