Look at this series: 14, 28, 20, 40, 32, 64, . . .What number should come next ? - Number Series - S

In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 14, 28, 20, 40, 32, 64, . . .What number should come next ?

A. 52

B. 56

C. 96

D. 128

E. None of the above

Answer: B. 56

This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.

Rule = (1st no.) (1st x 2 = 2nd no.) (2nd - 8 = 3rd no.) (3rd x 2 = 4th no.)....
Now (14) (14 x 2 = 28) (28 - 8 = 20) (20 x 2 = 40) (40 - 8 = 32) (32 x 2 = 64) (64 - 8 = 56)...
So the answer is b = 56.

Posted in: Number Series - Series Completion - Verbal Reasoning