Identify the missing number in the series: 12, 24, 36, ?, 60

B. 48

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

D. 80

Complete the series: 3, 6, 11, 18, ?

A. 25

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

C. 80

Identify the missing number in the series: 12, 24, 48, ?, 192.

B. 96