Number Series

1:

12,32,72,152,(?),632

A.

815

B.

613

C.

515

D.

312

 

Answer : D

Explanation :

32-12=20,72-32=40,152-72=80 and so on.
It means difference are doubling as 20,40,80,160,320 etc.
it otherwise means the required number will be 152+160=312 and 312+320=632

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Option: A

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