If the sequence is A, C, E, G, what is the next letter?

B. H

In the series 2, 4, 8, 16, what is the next number?

C. 32

What comes next in the pattern: 1, 1, 2, 3, 5, 8, ?

B. 11

If the pattern is X, Y, Z, A, B, what is the next letter?

A. C

In the sequence 5, 10, 20, 40, what is the next number?

C. 80