Three of the following four pairs of numbers are alike in a certain way and one is different. Find the odd one out.

Options

A. 136 - 153
B. 152 - 171
C. 63 - 72
D. 104 - 117

Answer

C

Explanation

Let us examine the pattern in difference between the stated numbers.
153-136 = 17 `to` Prime number
171-152 = 19 `to` Prime number
72-63 = 9 `to` Non-prime number
117-104 = 13. `to` Prime number
Hence, the pair 72-63 is the odd pair among the given 4 pair of numbers.