1.  Choose the correct alternative that will continue the same pattern and replace the question mark in the given series : 4, 9, 25, ?, 121, 169, 289, 361

A. 49
B. 64
C. 81
D. 87

Answer: Option A

Explanation:

The given series consists of squares of consecutive prime numbers i.e. 2², 3², 5², ......, 11², 13², 17², 19². so, missing term = 7² = 49.