Discussion of Question with ID = 075 under Missing-Numbers

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Question

9, 11, 20, 31, (?), 82.

A

41.

B

51.

C

71.

D

60.

Soln.
Ans: b

Every number is equal to sum of the previous two numbers.

9, 11, 20, 31, 51, 82.

9 + 11 = 20.

20 + 11 = 31.

31 + 20 = 51.

51 + 31 = 82.


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