10

Last updated
9 10 11
Cardinal ten
Ordinal 10th
(tenth)
Numeral system decimal
Factorization 2 × 5
Divisors 1, 2, 5, 10
Greek numeral Ι´
Roman numeral X, x
Roman numeral (unicode)X, x
Greek prefix deca-/deka-
Latin prefix deci-
Binary 10102
Ternary 1013
Senary 146
Octal 128
Duodecimal A12
Hexadecimal A16
Chinese numeral 十,拾
Hebrew י (Yod)
Khmer ១០
Armenian Ժ
Tamil
Thai ๑๐
Devanāgarī १०
Santali ᱑᱐
Bengali ১০
Arabic & Kurdish & Iranian ١٠
Malayalam
Egyptian hieroglyph 𓎆
Babylonian numeral 𒌋

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.

Contents

The number "ten" originates from the Proto-Germanic root "*tehun", which in turn comes from the Proto-Indo-European root "*dekm-", meaning "ten". This root is the source of similar words for "ten" in many other Germanic languages, like Dutch, German, and Swedish. The use of "ten" in the decimal system is likely due to the fact that humans have ten fingers and ten toes, which people may have used to count by.

Linguistics

Mathematics

Decagon

A ten sided polygon is called a decagon .

List of basic calculations

Multiplication 123456789101112131415162025501001000
10 × x10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 200 250 500 1000 10000
Division 123456789101112131415
10 ÷ x1053.32.521.61.4285711.251.110.900.830.7692300.7142850.6
x ÷ 100.10.20.30.40.50.60.70.80.911.11.21.31.41.5
Exponentiation 12345678910
10x10 100 1000 10000 100000 1000000 10000000 100000000 1000000000 10000000000
x101 1024 5904910485769765625604661762824752491073741824348678440110000000000

Science

Mysticism

The tetractys Tetractys.svg
The tetractys

In Pythagoreanism, the number 10 played an important role and was symbolized by the tetractys.

See also

Notes

    References

    1. Weisstein, Eric W. "Happy Number". mathworld.wolfram.com. Retrieved 2025-04-25.
    2. N. J. A. Sloane. "A005278: Noncototients". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation . Retrieved 2016-06-01.
    3. 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.