This article is about the number 10. For other uses of 'ten', see Ten (disambiguation). For other uses of the ordinal 10th, see Tenth (disambiguation). This article may contain excessive, poor or irrelevant examples. You can improve the article by adding more descriptive text. See Wikipedia's guide to writing better articles for further suggestions. (March 2010) ← 9 11 → 10 ← 10 11 12 13 14 15 16 17 18 19 → List of numbers — Integers 0 10 20 30 40 50 60 70 80 90 → Cardinal 10 ten Ordinal 10th (tenth) Numeral system decimal Factorization Divisors 1, 2, 5, 10 Roman numeral X Unicode symbol(s) X, x Greek Prefix deca-/deka- Latin Prefix deci- Binary 10102 Octal 128 Duodecimal A12 Hexadecimal A16 ---- Chinese numeral 十，拾 Hebrew י (Yod) Khmer ១០ Korean 십 Thai ๑๐ Hindi १० (Dush) Bangla ১০ (দশ) 10 (ten) (pronounced /ˈtɛn/ ( listen)) is an even natural number following 9 and preceding 11. Contents 1 In mathematics 1.1 In numeral systems 1.2 Counting 1.3 List of basic calculations 2 In science 2.1 Astronomy 3 In religion 4 In money 5 In music 6 In sports and games 7 In technology 8 In other fields 9 Historical years 10 See also 11 References 12 External links In mathematics

Ten is a composite number, its proper divisors being 1, 2 and 5. Ten is the smallest noncototient, a number that cannot be expressed as the difference between any integer and the total number of coprimes below it. Ten is the second discrete semiprime (2.5) and the second member of the (2.q) discrete semiprime family. Ten has an aliquot sum σ(n) of 8 and is accordingly the first discrete semiprime to be in deficit. All subsequent discrete semiprimes are in deficit. The aliquot sequence for 10 comprises five members (10,8,7,1,0) with this number being the second composite member of the 7-aliquot tree. It is the aliquot sum of only one number the discrete semiprime 14. Ten is a semi-meandric number. In bases 15, 18 and 30, ten is a 1-automorphic number (displayed as the numeral 'A').. Ten is the sum of the first three prime numbers, of the four first numbers (1 + 2 + 3 + 4), of the square of the two first odd numbers and also of the first four factorials (0! + 1! + 2! + 3!). Ten is the eighth Perrin number, preceded in the sequence by 5, 5, 7. A polygon with ten sides is a decagon, and 10 is a decagonal number. But it is also a triangular number and a centered triangular number.

Ten is the number of n-Queens Problem solutions for n = 5. In numeral systems Ten is the base of the decimal numeral system, by far the most common system of denoting numbers in both spoken and written language. Ten is the first two-digit number in decimal and thus the lowest number where the position of a numeral affects its value. Any integer written in the decimal system can be multiplied by ten by adding a zero to the end (e.g. 855 * 10 = 8550). The reason for the choice of ten is assumed to be that humans have ten fingers (digits). The digit '1' followed by '0' is how the value of p is written in base p. (E.g. 16 in hexadecimal is 10.) The Roman numeral for ten is X (which looks like two V's [the Roman numeral for 5] put together); it is thought that the V for five is derived from an open hand (five digits displayed). The Chinese word numeral for ten is 十, which resembles a cross. Counting 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Base Numeral system Number 1 unary ********** 2 binary 1010 3 ternary 101 4 quaternary 22 5 quinary 20 6 senary 14 7 septenary 13 8 octal 12 9 novenary 11 10 decimal 10 16 hexadecimal A

Ten is a Harshad number in bases 2, 3, 5, 6, 9 and all others above. 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 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 250 500 1000 10000 Division 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 10 5 2.5 2 1.25 1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 Exponentiation 1 2 3 4 5 6 7 8 9 10 11 12 13 10 100 1000 10000 100000 1000000 10000000 100000000 1000000000 10000000000 100000000000 1000000000000 10000000000000 1 1024 59049 1048576 9765625 60466176 282475249 1073741824 3486784401 10000000000 25937424601 61917364224 137858491849 In science The atomic number of neon. The number of carbon atoms in decane, a hydrocarbon. The number of hydrogen atoms in butane, a hydrocarbon. The number of spacetime dimensions in some superstring theories. Astronomy The New General Catalogue object NGC 10, a magnitude 12.5 spiral galaxy in the constellation Sculptor. The Saros number of the solar eclipse series which began on -2467 February 28 and ended on -1169 April 18. The duration of Saros series 10 was 1298.1 years, and it contained 73 solar eclipses. The Saros number of the lunar eclipse series which began on -2454 June 17 and ended on -1138 August 15. The duration of Saros series 10 was 1316.2 years, and it contained 74 lunar eclipses. Messier object M10, a magnitude 6.4 globular cluster in the constellation Ophiuchus. In religion The Ten Commandments of Exodus1 and Deuteronomy2 are considered a cornerstone of Judaism and Christianity. People traditionally tithed one-tenth of their produce. The practice of tithing is still common in Christian churches today, though it is disputed in some circles as to whether or not it is required of Christians. In Deuteronomy 26:12, the Torah commands Jews to give one-tenth of their produce to the poor (Maaser Ani). From this verse and from an earlier verse (Deut. 14:22) there derives a practice for Jews to give one-tenth of all earnings to the poor.3 Ten Plagues were inflicted on Egypt in Exodus 7-12 Jews observe the annual Ten Days of Repentance beginning on Rosh Hashanah and ending on Yom Kippur. In Jewish liturgy, Ten Martyrs are singled out as a group. There are said to be Ten Lost Tribes of Israel (those other than Judah and Benjamin) There are Ten Sephirot in the Kabbalistic Tree of Life The Bible records 10 generations between Adam and Noah, and 10 generations between Noah and Abraham In Judaism, ten adults are the required quorum for prayer services. In money There are ten cents in a U.S. or Canadian dime, itself one tenth of a dollar. The word was shortened from decime. The denomination of Canadian paper money bearing a portrait of Sir John A. Macdonald, Canada's first Prime Minister. The denomination of U.S. paper money bearing a portrait of Alexander Hamilton, America's first Secretary of the Treasury. In music The interval of a major or minor tenth is an octave plus a major or minor third. The title of quite a few albums, including recordings by Pearl Jam and LL Cool J. See Ten (album). The number of violin sonatas composed by Ludwig van Beethoven In sports and games In rugby union the fly-half wears the 10 shirt. In blackjack, the Ten, Jack, Queen and King are all worth 10 points. In ten-pin bowling 10 pins are arranged in a triangular pattern and there are 10 frames per game. In football (soccer), the jersey number of many players, particularly Strikers. 'Number 10' player is most often used as a synonym for a soccer team's playmaker. In American Football, 10 is the number of yards the offense must advance to maintain possession in four downs. The highest score possible in Olympics competitions. In cricket, 10 is the number of wickets required to be taken by the bowling side for the batting side to be bowled out In Australian rules football, considered the break even amount of games won in a regular 22 game season. In Baseball there are always at least 10 players on the field at a time (including the batter). Driving a racing car at ten-tenths is driving as fast as possible, on the limit. In Basketball, 10 feet is the height of the goals. Also the number of players on the court (5 on each team). In technology Ten-codes are commonly used on emergency service radio systems. Ten refers to the "meter band" on the radio spectrum between 28 and 29.7 MHz, used by amateur radio. ASCII and Unicode code point for line feed In MIDI, Channel 10 is reserved for unpitched percussion instruments. In the Rich Text Format specification, all language codes for regional variants of the Spanish language are congruent to 10 mod 256. In Mac OS X, the F10 function key tiles all the windows of the current application and grays the windows of other applications. The IP addresses in the range 10.0.0.0/8 (meaning the interval between 10.0.0.0 and 10.255.255.255) is reserved for use by Private networks by RFC 1918. In other fields 10 playing cards of all four suits Increasing a quantity by one order of magnitude is most widely understood to mean multiplying the quantity by ten. A collection of ten items (most often ten years) is called a decade. A decapod crustacean has ten limbs. To reduce something by one-tenth is to decimate. (In ancient Rome, the killing of one in ten soldiers in a cohort was the punishment for cowardice or mutiny; or, one-tenth of the able-bodied men in a village as a form of retribution, thus causing a labor shortage and threat of starvation in agrarian societies.) With ten being the base of the decimal system, a scale of 1 to 10 is often used to rank things, as a smaller version of a 1-to-100 scale (as is used in percentages and wine-tasting). Blake Edwards' 1979 movie 10 (film). Something that scores perfectly is "a perfect ten". A person who is attractive and physically flawless is often said to be "a ten", from the idea of ranking that person's appearance and sex-appeal on a 1-to-10 scale. Counting from one to ten before speaking is often done in order to cool one's temper. In astrology, Capricorn is the 10th astrological sign of the Zodiac. In Chinese astrology, the 10 Heavenly Stems, refer to a cyclic number system that is used also for time reckoning. The ordinal adjective is denary. An online show hosted by Microsoft.4 10 is in the name of the television show Ben 10 A 1977 short documentary film Powers of Ten depicts the relative scale of the Universe in factors of ten (orders of magnitude). CBS has a game show called Power of 10, where the player's prize goes up and down by either the previous or next power of ten. There are ten official inkblots in the Rorschach inkblot test. The traditional Snellen chart uses 10 different letters.

Ten is: Number of kingdoms in Five Dynasties and Ten Kingdoms Period House number of 10 Downing Street The number of Provinces in Canada The designation of United States Interstate 10, a freeway that runs from California to Florida. Number of dots in a tetractys. The number of the French department Aube The number of regions in Ghana. Historical years 10 A.D., 10 B.C., 1910, 2010, etc. See also Mathematics portal References ^ Exodus 20:2-13 ^ Deuteronomy 5:6-17 ^ [1] ^ [2] External links Look up ten in Wiktionary, the free dictionary. Wikimedia Commons has media related to: 10 (number)

Ten is: Number of kingdoms in Five Dynasties and Ten Kingdoms Period House number of 10 Downing Street The number of Provinces in Canada The designation of United States Interstate 10, a freeway that runs from California to Florida. Number of dots in a tetractys. The number of the French department Aube The number of regions in Ghana. Historical years 10 A.D., 10 B.C., 1910, 2010, etc. See also Mathematics portal References ^ Exodus 20:2-13 ^ Deuteronomy 5:6-17 ^ [1] ^ [2] External links Look up ten in Wiktionary, the free dictionary. Wikimedia Commons has media related to: 10 (number)

Ten is: Number of kingdoms in Five Dynasties and Ten Kingdoms Period House number of 10 Downing Street The number of Provinces in Canada The designation of United States Interstate 10, a freeway that runs from California to Florida. Number of dots in a tetractys. The number of the French department Aube The number of regions in Ghana. Historical years 10 A.D., 10 B.C., 1910, 2010, etc. See also Mathematics portal References ^ Exodus 20:2-13 ^ Deuteronomy 5:6-17 ^ [1] ^ [2] External links Look up ten in Wiktionary, the free dictionary. Wikimedia Commons has media related to: 10 (number)

Ten is: Number of kingdoms in Five Dynasties and Ten Kingdoms Period House number of 10 Downing Street The number of Provinces in Canada The designation of United States Interstate 10, a freeway that runs from California to Florida. Number of dots in a tetractys. The number of the French department Aube The number of regions in Ghana. Historical years 10 A.D., 10 B.C., 1910, 2010, etc. See also Mathematics portal References ^ Exodus 20:2-13 ^ Deuteronomy 5:6-17 ^ [1] ^ [2] External links Look up ten in Wiktionary, the free dictionary. Wikimedia Commons has media related to: 10 (number)

Ten is: Number of kingdoms in Five Dynasties and Ten Kingdoms Period House number of 10 Downing Street The number of Provinces in Canada The designation of United States Interstate 10, a freeway that runs from California to Florida. Number of dots in a tetractys. The number of the French department Aube The number of regions in Ghana. Historical years 10 A.D., 10 B.C., 1910, 2010, etc. See also Mathematics portal References ^ Exodus 20:2-13 ^ Deuteronomy 5:6-17 ^ [1] ^ [2] External links Look up ten in Wiktionary, the free dictionary. Wikimedia Commons has media related to: 10 (number)

Ten is: Number of kingdoms in Five Dynasties and Ten Kingdoms Period House number of 10 Downing Street The number of Provinces in Canada The designation of United States Interstate 10, a freeway that runs from California to Florida. Number of dots in a tetractys. The number of the French department Aube The number of regions in Ghana. Historical years 10 A.D., 10 B.C., 1910, 2010, etc. See also Mathematics portal References ^ Exodus 20:2-13 ^ Deuteronomy 5:6-17 ^ [1] ^ [2] External links Look up ten in Wiktionary, the free dictionary. Wikimedia Commons has media related to: 10 (number)