In a sequence of letters: A, C, E, G, ?, K. What is the missing letter?

B. H

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

A. E

In the series: 2, 4, 8, 16, ?, 64. What is the missing number?

B. 32

In a pattern of letters: X, Y, Z, A, B, ?, D. What is the missing letter?

A. C

Identify the missing character in the series: 2, 4, 6, ?, 10, 12.

B. 8