Number Series

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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.

Q 5.0, 2, 8, 14,___

A)22
B)24
C)26
D)28
Answer : Option B

Explanation:
The number are 12- 1, 22 - 2, 32- 1, 42- 2,....
.'. Missing number = 52 - 1 = 24

Q 6.121, 225, 361,_____?

A)484
B)576
C)529
D)625
Answer : Option C

Explanation:
. The numbers are 112, 152, 192,... i.e. 112, (11 + 4 * 1)2, (11 + 4 * 2)2,....
.'. Missing number =(11 + 4 * 3)2 = (23)2= 529.
Q 7.0.5, 1.5, 4.5, 13.5,____?

A)40.5
B)36.5
C)38.5
D)37.5
Answer : Option A

Explanation:
Each term of the series is obtained by multiplying the preceding term by 3.
.'. Missing number = 13.5 * 3 = 40.5.

Q 8.1, 6, 15,_____ , 45, 66

A)26
B)28
C)32
D)29
Answer : Option B

Explanation:
The pattern is + 5, + 9,13,+ ..., + 21
.'. Missing number = 15 + 13 = 28.


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