In Mathematics
100 is the square of 10 (in scientific notation it is written as 102). The standard SI prefix for a hundred is "hecto-".
100 is the basis of percentages (per cent meaning "per hundred" in Latin), with 100% being a full amount.
100 is the sum of the first nine prime numbers, as well as the sum of four pairs of prime numbers (47 + 53, 17 + 83, 3 + 97, 41 + 59).
100 is the sum of the cubes of the first four integers (100 = 13 + 23 + 33 + 43). This is a direct consequence of 100 equaling the square of the sum of the first four integers (100 = 102 = (1 + 2 + 3 + 4)2).
26 + 62 = 100, thus 100 is a Leyland number.
100 is an 18-gonal number. It is divisible by the number of primes below it, 25 in this case. It can not be expressed as the difference between any integer and the total of coprimes below it, making it a noncototient. It can be expressed as a sum of some of its divisors, making it a semiperfect number.
100 is a Harshad number in base 10, and also in base 4, and in that base it is a self-descriptive number.
There are exactly 100 prime numbers whose digits are in strictly ascending order. (e.g. 239, 2357 etc.)
100 is the smallest number whose common logarithm is a prime number (i.e. 10n for which n is prime).
Read more about this topic: 100 (number)
Famous quotes containing the word mathematics:
“In mathematics he was greater
Than Tycho Brahe, or Erra Pater:
For he, by geometric scale,
Could take the size of pots of ale;
Resolve, by sines and tangents straight,
If bread and butter wanted weight;
And wisely tell what hour o’ th’ day
The clock doth strike, by algebra.”
—Samuel Butler (1612–1680)
“I must study politics and war that my sons may have liberty to study mathematics and philosophy.”
—John Adams (1735–1826)