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

A. B

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

A. E

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

A. 16

What character should be inserted in the sequence X, Y, ?, A, B, C?

A. Z

In a sequence of letters: A, C, E, G, ?, K. What is the missing letter?

B. H