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* The car number most associated with former [[NASCAR]] team owner [[Junie Donlavey]] |
* The car number most associated with former [[NASCAR]] team owner [[Junie Donlavey]] |
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* The number of minutes in a [[football (soccer)]] match. |
* The number of minutes in a [[football (soccer)]] match. |
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==In Wellness Plans== |
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* [[P90X]] is a rigorous work out plan for 90 days with proclaimed incredible results. |
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==See also== |
==See also== |
Revision as of 17:52, 14 July 2012
90 (ninety) is the natural number preceded by 89 and followed by 91.
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---|---|---|---|---|
Cardinal | ninety | |||
Ordinal | th | |||
Numeral system | 90 | |||
Factorization | ||||
Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 | |||
Greek numeral | Ϟ´ | |||
Roman numeral | XC | |||
Binary | 10110102 | |||
Ternary | 101003 | |||
Senary | 2306 | |||
Octal | 1328 | |||
Duodecimal | 7612 | |||
Hexadecimal | 5A16 |
Look up ninety in Wiktionary, the free dictionary.
In mathematics
- Because 90 is the sum of its unitary divisors (excluding itself), it is a unitary perfect number, and because it is equal to the sum of a subset of its divisors, it is a semiperfect number. 90 is a pronic number. But it is also a nontotient. It is a Perrin number, preceded in the sequence by 39, 51, 68.
- In normal space, the interior angles of a square measure 90 degrees each. Also, in a right triangle, the angle opposing the hypotenuse measures 90 degrees, with the other two angles adding up to 90 for a total of 180 degrees.[1] Thus, an angle measuring 90 degrees is called a right angle.[2]
- 90 is divisible by the sum of its base 10 digits, thus it is a Harshad number.
In science
- Ninety is the atomic number of thorium, an actinide. As an atomic weight, 90 identifies an isotope of strontium, a by-product of nuclear reactions including fallout. It contaminates milk.
- The latitude of the North Pole and the South Pole are 90 degrees.
In sports
- Nike Total 90 Apparel is a brand name of football apparel and football equipment from equipment bags to goalkeeper gloves
- Major League baseball bases are 90 feet (27 m) away in distance
- The car number most associated with former NASCAR team owner Junie Donlavey
- The number of minutes in a football (soccer) match.