In this type of questions, one term in t...

In this type of questions, one term in the number series is wrong. Find out the wrong term.
1,3,10,21,64,129,356,777

A

21

B

129

C

10

D

356

Text Solution

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The correct Answer is:

D

The correct pattern is x 2 + 1, x3 + 1, x2 + 1, x3 + 1
So, 356 is wrong and must be replaced by `(129 xx 3 + 1)` i.e. 388.

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In this type of questions, one term in the number series is wrong. Find out the wrong term.
1,3,10,21,64,129,356,777