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

A. B

Identify the missing character in the series 1, 4, 9, ?, 25, 36.

A. 16

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

A. M

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

A. 16

Bird is to Nest as Fish is to ?

B. AQUARIUM