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

A. B

In the sequence: 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 the sequence 2, 4, 8, 16, ?, 64, what is the missing number?

A. 32

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

A. E