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

A. D

If the pattern is 1, 4, 9, ?, 25, 36, what number should replace the question mark?

A. 16

In the series X, Y, ?, A, B, C, which character is missing?

A. Z

Find the missing character in the pattern: 2, 4, 8, ?, 32.

A. 16

What is the missing character in the sequence: M, N, O, ?, Q, R?

A. P