In Choose odd Number questions, certain numbers are given, out of which all except one are alike in some manner while one is different and this number is to be chosen as the answer.

Choose or find odd number

2 , 16 , 56 , 128

A. 2
B. 16
C. 56
D. 128
Answer: C . 56

Justification: Each of the numbers except 56, can be expressed in terms of power of 2.