Find the missing term in the following series.

1)

4, 8, 28, 80, 244, ?


A) 428

B) 278

C) 728

D) 628

Answer:

Option C

Explanation:

The terms of the given series are: 31+ 1,32-1, 33+ 1, 34-1, 35+1, .....

So, missing term =36 - 1 = 729 - 1 = 728

Hence the answer is c.