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Sequence

In following ...

Question

In following questions, one term in number series is incorrect.
Find out the incorrect number 2, 5, 10, 17, 26, 37, 50, 64

A

17

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B

26

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C

37

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D

64

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Solution

The correct option is D 64
The numbers are $1^{2} + 1, 2^{2} + 1, 3^{2} + 1$ and so on.
So, 64 is wrong.
The correct term is (82 + 1) i.e. 65.

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