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

A. B

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

B. H

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

A. B

In a series of numbers: 2, 4, 8, 16, ?, 64, what is the missing number?

B. 32

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

B. H