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

A. V

Find the missing number in the series: 5, 10, 20, ?, 80

B. 40

If the sequence is 1, 1, 2, 3, 5, what is the next number?

B. 7

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

A. V

Identify the pattern: 1, 1, 2, 3, 5, 8, ?

D. 13