In the sequence 2, 4, 8, 16, ?, 64, what is the missing number?

B. 32

In the pattern 2, 4, 8, ?, 32, what number should replace the question mark?

B. 16

In the series: 1, 4, 9, ?, 25, what number should replace the question mark?

A. 16

Identify the missing letter in the pattern: A, C, E, ?, I.

A. G

What character should replace the question mark in the sequence: A, B, C, ?, E?

A. D