What number should replace the question mark in the series: 2, 6, 12, 20, ?

B. 42

Find the missing number in the series: 5, 11, 23, 47, ?

A. 95

What is the next number in the series: 1, 4, 9, 16, ?

B. 25

Identify the missing term in the series: 3, 7, 15, 31, ?

A. 63

What number should come next in the series: 1, 1, 2, 3, 5, ?

B. 8