What is the next number in the series: 3, 6, 11, 18, ?

B. 25

What is the next number in the series: 3, 6, 11, 18, ?

B. 25

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

A. 80

What is the missing term in the series: 2, 6, 12, 20, ?, 42

B. 32

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

B. 32