9 , 12 , 11 , 14 , 13 , x , 15 - Number Series - Series Completion - Verbal Reasoning question

A. 12

B. 16

C. 10

D. 17

E. None of the above

Answer: B. 16

Alternately we add 3 and subtract 1. Thus,
9 + 3 = 12, 12 - 1 = 11, 11 + 3 = 14
and so on. Missing number = 13 + 3 = 16.

Posted in: Number Series - Series Completion - Verbal Reasoning