Choose the one which does not belong to the group?

2:8 3:9 4:64 6:216

3:9

The number on the right is the cube of the number on the left i.e. 2:8 = 23 = 8 3:9 = 32 = 9 4:64 = 43 = 64 6:216 = 63 = 216 As, the second option denotes the value which is a square and does not follow the pattern. Thus, it will be the answer. Ans :- 3 : 9