The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
3, 7, 15, 31, 63, 127, ?

Options

A. 50
B. 58
C. 57
D. 156

Answer

C

Explanation

Here , the respective difference between terms is as follows : 5, 10 , 15, 20 , 25 …….
As 7 + 5 = 12
22 + 15 = 37
`:.` The next term will be
`= 37 + 20 = 57`