Four sets of numbers are given out of which three are alike in a certain way and one is different. Select the set of numbers that is different from the rest.

5 - 25 - 225 6 - 36 - 216 9 - 81 - 729 3 - 9 - 27

5 - 25 - 225

5 - 25 - 225 = =   3 - 52 - 152   (Odd)   6 - 36 - 216 =   6 - 62 - 63                  9 - 81 - 729 =   9 - 92 - 93                3 - 9 - 27 =   3 - 32 - 33