10
Natural number
From Wikipedia, the free encyclopedia
10 (ten) is the even natural number following 9 and preceding 11. Ten is the base of decimal numeral systems, the most common systems for denoting numbers in both spoken and written language.
| ||||
|---|---|---|---|---|
| Cardinal | ten | |||
| Ordinal | 10th (tenth) | |||
| Numeral system | decimal | |||
| Factorization | 2 Ã 5 | |||
| Divisors | 1, 2, 5, 10 | |||
| Greek numeral | δ | |||
| 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 | åï¼æ¾ | |||
| Hebrew | × (Yod) | |||
| Khmer | á¡á | |||
| Armenian | Ôº | |||
| Tamil | ௰ | |||
| Thai | à¹à¹ | |||
| DevanÄgarÄ« | १० | |||
| Santali | á±á± | |||
| Bengali | ১০ | |||
| Arabic & Kurdish & Iranian | Ù¡Ù | |||
| Malayalam | ൰ | |||
| Egyptian hieroglyph | ð | |||
| Babylonian numeral | ð | |||
The English name for the number "ten" originates from the Proto-Germanic root "*tehun", which in turn comes from the Proto-Indo-European root "*dekm-". This root is the source of similar words for "ten" in many other Germanic languages, like Dutch, German, and Swedish. The widespread use of decimal systems is believed to be because humans have ten fingers and ten toes, which people may have used to count by.
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
- 10 is a composite number and a happy number.[1]
- 10 is the smallest noncototient number.[2]
Decagon
A ten sided polygon is called a decagon.
List of basic calculations
| Division | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 ÷ x | 10 | 5 | 3.3 | 2.5 | 2 | 1.6 | 1.428571 | 1.25 | 1.1 | 1 | 0.90 | 0.83 | 0.769230 | 0.714285 | 0.6 |
| x ÷ 10 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 10x | 10 | 100 | 1000 | 10000 | 100000 | 1000000 | 10000000 | 100000000 | 1000000000 | 10000000000 |
| x10 | 1 | 1024 | 59049 | 1048576 | 9765625 | 60466176 | 282475249 | 1073741824 | 3486784401 | 10000000000 |
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).
- The 10th element of the periodic table is neon.
- The 10th transition metal is zinc.
Mysticism
In Pythagoreanism, the number 10 played an important role and was symbolized by the tetractys.
