Which is the odd one out and why?
10 21 18 61 25
Reordering them as 10, 18, 21, 25, 61 and converting to their alphabetic equivalents, and allowing for rollovers (A=1, 27, 53, etc.), the set becomes J, R, U, Y, I. If you look at the frequency distribution of these letters in Scrabble, you find that the only odd occurence is the letter I, of which there are nine in the game. Therefore 61 must be the odd one out.
