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In "Number Series" question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces

In following questions, one term in number series is incorrect.

Find out the incorrect number 1, 5, 9, 16, 25, 37, 49

Option:
A. 9
B. 15
C. 25
D. 37
Answer: B . 15

Justification:

The given sequence is a combination of two series :
I.   1, 9, 25, 49   and
II.   5, 15, 37
The pattern in I is + 8, + 16, + 24.
The sequence in II is 22 + 1, 42 + 1, 62 + 1.
So, 16 is wrong and must be replaced by (42 + 1)  i.e. 17.


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