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.
`3,7, 15,39,63, 127,255,511`

A

15

B

39

C

63

D

127

Text Solution

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The correct Answer is:

B

The correct pattern is x2 + 1
So, 39 is wrong and must be replaced by `(15 xx 2 +1)` i.e. 31.

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In this type of questions, one term in the number series is wrong. Find out the wrong term. `3,7, 15,39,63, 127,255,511`

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In this type of questions, one term in the number series is wrong. Find out the wrong term.
`3,7, 15,39,63, 127,255,511`