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15 (number) Facts for Kids. Kiddle Encyclopedia.
This article is about the number fifteen. For the year, see 15.
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| Cardinal | fifteen | |||
| Ordinal | 15th (fifteenth) |
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| Factorization | 3 · 5 | |||
| Divisors | 1, 3, 5, 15 | |||
| Roman numeral | XV | |||
| Binary | 11112 | |||
| Ternary | 1203 | |||
| Quaternary | 334 | |||
| Quinary | 305 | |||
| Senary | 236 | |||
| Octal | 178 | |||
| Duodecimal | 1312 | |||
| Hexadecimal | F16 | |||
| Vigesimal | F20 | |||
| Base 36 | F36 | |||
| Hebrew | ט"ו (Tet Vav) | |||
Fifteen is a number. It comes between fourteen and sixteen, and is an odd number. It is divisible by 1, 3, 5, and 15.
In Roman numerals, 15 is written as XV.