Encyclopedia > Twelve

  Article Content


Twelve (12) is the natural number following eleven and preceding thirteen.

Twelve is a composite number, its proper divisors being 1, 2, 3, 4 and 6. Twelve is also a highly composite number, the next one being 24[?].

A twelve-sided polygon is a dodecagon. A twelve-sided polyhedron is a dodecahedron.

The number twelve is often used as a sales unit in trade, and is often referred to as a dozen. Twelve dozen are known as a gross. Note that there are thirteen loaves in a baker's dozen.

There are twelve months in a year.

The duodecimal system, which is the use of 12 as a division factor for many historical weights and measures, including hours, probably originates from Mesopotamia. See also: base 12.

In the United States, juries deciding legal cases typically have twelve members.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
List of closed London Underground stations

... never opened) North Weald tube station[?] Ongar tube station[?] St Mary's (Whitechapel Road) tube station[?] South Acton tube station[?] South Kentish Town tube ...

This page was created in 100.9 ms