12 (number)

In mathematics

In Mathematical, twelve is a made up Nombre, its dividers own are 1, 2, 3, 4 and 6. Twelve is also a highly made up Nombre, and the following is 24.

Twelve is the product of 3 and 4, the first four positive entireties posted in the equation 12 = 3 × 4, which can be continued with the equation 56 = 7 × 8.

A Polygon at twelve east coasts a Dodecagon. A polyhedron with twelve faces is a Dodécaèdre. Twelve is a pentagonal Nombre.

The Duodecimal system (12₁₀ (12) = 10₁₂), which is the use of 12 as factor of division for much of historical weights and measures, including systems still used such as the hours, is probably originating in Mésopotamie.

See also: duodecimal System

Smallest Carré trimagic known to date is of order 12.

As Schoolhouse Rock (an American didactic series of 1972 containing song of rock'n'roll) explains it in one of its songs “Little Twelvetoes” ( Twelve little toes ), if humanity had been born with twelve fingers, it would have counted and multiplied by using the duodecimal system. (Although it is not necessary to have twelve fingers, since one can easily arrive at the duodecimal system by simply counting the phalange of the fingers with the same inch of the hand, a practice still of use in certain people until our days).

Twelve is the superfactorielle one of 3: sf (3) = 1! X 2! X 3! ,

In base 13 and in the higher bases, (such as the Hexadecimal ), twelve is represented by C.

In English, the etymology (Weekley, Skeat) suggests that “twelve” (similar to “eleven”) consists of two parts, the first meaning “two” (two) and the second “leftover” (remains), therefore a literal translation would like to say “two remainders (after having taken ten)”.

Twelve is a Nombre Harshad, a oblong Nombre, a Nombre of Pell.

In other fields

The number twelve is often used as unit of sale in the trade, and often refers to a Douzaine . Twelve dozen is called a Grosse. (In the Anglo-Saxon culture, there are thirteen breads in a Douzaine baker .)

A douzain is a poem of twelve worms.

An old currency of the Middle Ages corresponding to twelve sums of money.

There are twelve Mois in a Année.

Midi corresponds to the twelfth hour, sometimes noted 12:00 pm.
Minuit is sometimes noted 12:00 amndt.

The Western Zodiaque has twelve signs, like the Chinese zodiac.

The Olympian Divinités were 12.

The Chiisme duodécimain recognizes twelve caliphs.

There are normally twelve pairs of coasts in an human body.

The Jewish tradition and the old will of the Bible speaks about the twelve tribes of Israel. The new will of the Bible describes twelve Apôtre S of Jesus-Christ.

Twelve stars are placed in circle on the European Drapeau.

In practice Jewish modern, a girl obtains her Bat Mitsva the Shabbat according to her twelfth birthday.

With the the United States, twelve people are paid to sit in a Jury for the lawsuits of crimes. This in all the states, except four, like in the federal courts and D.C.

Twelve is:

the Atomic number of the Magnesium, a alkaline-earth Metal.
the code ASCII and Unicode for form feed .
In Music, the number of Semitone S in a octave. Therefore, it is the full number of major keys, (by not counting the equivalents Enharmonique S) and the full number of minor keys (by not counting either the equivalents). A formed range of the whole of these let us tons is called chromatic .
the number of daN (main) ranks with the Judo.
With the Rugby, one of the centers, generally but not always the interior center, carries the n° 12.
the number of years of Mariage of the weddings of Soie.
In the Test of colors of Ishihara, 12 is on the first plate that the people of normal vision and daltoniennes can distinguish.
historical Years: -12, 12, or 1912.
the n° of the French Department, the Aveyron.
the number of the French highway A12 which leaves the A13 to reach Trappes. It belongs to the Triangle of Roquencourt .
According to the Maya mythology, the date of the end of the world, transposed in the Gregorian calendar, would take place the 12/21/2012.
the old single number of the Telephone informations French.
the name of a hamlet of Paulhac (Cantal), temporarily renamed " 118 008" by France Telecom in the presence of the mayor and of the municipal council, within the framework of an advertizing operation related to the Disparition of the single number of telephone information in France
the Duodénum (of Latin duodecim , twelve) is the first part of the Intestin S which makes approximately twelve inches length.

twelve

Twelve fact part of the title of films:

External bonds

Almanac and dictionary of the numbers (site of Gerard Villemin)
Wiktionnaire
Small lexicon of the number twelve

Zh-yue: 12

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