Series Completion - Verbal and Reasoning

Directions to SolveChoose the correct alternative that will continue the same pattern and replace the question mark in the given series.
Q1:

1, 5, 13,25,41,?

A 51

B 57

C 61

D 63

ANS:C - 61

Explanation: The pattern is + 4, + 8, + 12, + 16...... So, missing term = 41 + 20 = 61.