Find the missing number in the series: 5, 10, 20, 40, ?

C. 80

Identify the missing term in the series: 3, 6, 11, 18, ?

A. 25

Identify the missing term in the series: 1, 4, 9, 16, ?, 36

B. 25

What number should replace the question mark in the series: 1, 2, 4, 8, 16, ?

B. 32

Find the missing number in the series: 5, 10, 20, 40, ?

C. 80