Friday, October 15, 2010

100

100 = 22 x 52.

100 has a representation as a sum of two squares: 100 = 62 + 82.

100 is the sum of the first four cubes: 100 = 13 + 23 + 33 + 43. It is the smallest square that is the sum of consecutive cubes.

100 is the sum of the 9th and 10th triangular numbers: 100 = 45 + 55.

100 is the sum of the first 10 odd numbers: 100 = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19.

The first three primes add to 10, and the first 32 primes add to 102 = 100.

The Romans wrote 100 as C. This is an abbreviation for the Latin word centum. A cent is a hundredth of a dollar, and a centime was a hundredth of a franc.

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