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

A. K

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

C. 32

Identify the next term in the pattern: 1, 1, 2, 3, 5, 8, ?

B. 11

What is the next letter in the series: Z, Y, X, W, ?

B. U

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

D. 80