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 9.4, 32, 128,______?

A)255
B)256
C)233
D)244
Answer : Option B

Explanation:
The pattern is * 8, * 4,....
.'. Missing term = 128 * 2 = 256.

Q 10.0, 2, 8, ____,24 ?

A)23
B)22
C)24
D)26
Answer : Option C

Explanation:
. The number are 12 - 1, 22 - 2, 32 - 1, 42 - 2,....
.'. Missing number = 16 - 2 = 14.

Q 11.12, 32, 72, 152,312,__

A)560
B)660
C)530
D)632
Answer : Option D

Explanation:
The pattern is + 20, + 40, + 80,160,...
.'. Missing number = 312+320=632.

Q 12.21, 25, 33, 49, 81,_______?

A)136
B)144
C)145
D)165
Answer : Option C

Explanation:
The pattern is + 4, + 8, + 16, + 32,.... i.e. + 22, + 23, + 24, + 25,...br> .'. Missing number = 81 + 26 = 81 + 64 = 145.


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