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(Redirected from 10.) This article is about the number. For the years, see 10 BC and AD 10. For other uses, see Ten (disambiguation). "10th" redirects here. For other uses, see Tenth (disambiguation). Natural number
← 9 10 11 →
10 11 12 13 14 15 16 17 18 19 0 10 20 30 40 50 60 70 80 90
Cardinalten
Ordinal10th
(tenth)
Numeral systemdecimal
Factorization2 × 5
Divisors1, 2, 5, 10
Greek numeralΙ´
Roman numeralX, x
Roman numeral (unicode)X, x
Greek prefixdeca-/deka-
Latin prefixdeci-
Binary10102
Ternary1013
Senary146
Octal128
DuodecimalA12
HexadecimalA16
Chinese numeral十,拾
Hebrewי (Yod)
Khmer១០
ArmenianԺ
Tamil
Thai๑๐
Devanāgarī१०
Bengali১০
Arabic & Kurdish & Iranian١٠
Malayalam
Egyptian hieroglyph𓎆
Babylonian numeral𒌋

10 (ten) is the even natural number following 9 and preceding 11. Ten is the base of the decimal numeral system, the most common system of denoting numbers in both spoken and written language.

Linguistics

  • A collection of ten items (most often ten years) is called a decade.
  • The ordinal adjective is decimal; the distributive adjective is denary.
  • Increasing a quantity by one order of magnitude is most widely understood to mean multiplying the quantity by ten.
  • 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.)

Mathematics

Ten is the smallest noncototient number. There are exactly 10 small Pisot numbers that do not exceed the golden ratio.

Decagon

Main article: Decagon

A ten sided polygon is called a decagon.

Science

The metric system is based on the number 10, so converting units is done by adding or removing zeros (e.g. 1 centimetre = 10 millimetres, 1 decimetre = 10 centimetres, 1 meter = 100 centimetres, 1 dekametre = 10 meters, 1 kilometre = 1,000 meters).

Mysticism

The tetractys

See also

Notes

References

  1. "Sloane's A005278 : Noncototients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-01.
  2. M.J. Bertin; A. Decomps-Guilloux; M. Grandet-Hugot; M. Pathiaux-Delefosse; J.P. Schreiber (1992). Pisot and Salem Numbers. Birkhäuser. ISBN 3-7643-2648-4.

External links

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