1.  Choose the correct alternative that will continue the same pattern and replace the question mark in the given series : 6, 13, 25, 51, 101, ?

A. 201
B. 202
C. 203
D. 205

Answer: Option C

Explanation:

The pattern is × 2 + 1, × 2 - 1, × 2 - 1,× 2 + 1, × 2 - 1, ...... So, missing term = 101 × 2 + 1 = 203.