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

3, 6, 5, 20, 7, 42, 9,

Option:
A. 54
B. 60
C. 66
D. 72
Answer: D . 72

Justification:

The sequence is a combination of two series :
I.    3, 5, 7, 9      and
II.   6, 20, 42, (....)
The pattern is followed in II is + 14, + 22,....
.'. Missing number = 42 + 30 = 72.


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