The base of our familiar number system, which stems directly from the fact that we have ten fingers on which to count. Ten is the only triangular number that is a sum of consecutive odd squares (10 = 12 + 32) and the only composite integer such that all of its positive integer divisors other than 1 are of the form x2 + 1 (2 = 12 + 1, 5 = 22 + 1, 10 = 32 + 1). Strange but true: the lifespan of a taste bud is ten days.
Related category NOTABLE NUMBERS
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact