In a sequence of letters: A, C, E, G, ?, K, M, O, what is the missing letter?

B. H

In the sequence A, B, C, ?, E, F, what character should replace the question mark?

A. D

Identify the missing character in the series: 2, 4, 8, 16, ?, 64. What is the missing number?

B. 32

Identify the missing character in the series 1, 4, 9, ?, 25, 36.

A. 16

In the series: 1, 4, 9, 16, ?, 36. What is the missing number?

B. 25