Monday, October 3, 2011

0.41070991959948644

I come back with another awesome title. Sorry ;D ...

I recently had to think up a random number. To be more precise, a random-looking integer with about 2 digits. And that's when the troubles began.

  • Any digit from 0 to 9 is way too common. (0, 1, 2, 3, 4, 5, 6, 7, 8, 9 are out of the picture)
  • Primes are overrated. (11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97)
  • Perfect squares are annoying. (16, 25, 36, 49, 64, 81)
  • So are powers of two. (32)
  • And anything divisible by three you can overly easily spot by adding digits. (12, 15, 18, 21, 24, 27, 30, 33, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 84, 87, 90, 93, 96, 99)
  • So can you with zeros and fives. (10, 20, 35, 40, 50, 55, 65, 70, 80, 85, 95)
  • Doubles are plain offensive. (22, 44, 77, 88)
  • Due to several works of fiction I will not mention, anything with a abundance of 7 will go through the trap. (37, 74, 76, 97)
 That leaves me with 14, 26, 28, 34, 38, 46, 52, 58, 62, 68, 82, 86, 92, 94, 98. But these are all even numbers. Goodness me. Ah, but -- I missed one: 91. There ya go, one perfectly random number. Yay!

Oh, wait...

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