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

A. 16

Identify the missing letter in the sequence: J, K, L, ?, N.

B. M

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

A. 8

What is the missing character in the sequence: 2, 4, 8, ?, 32?

A. 16

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

A. 16