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

B. 25

What character should be inserted in the sequence: 2, 4, 6, ?, 10?

B. 8

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

A. E

In the pattern: X, Y, Z, A, ?, C. What is the missing letter?

A. B

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

A. G