one term in the number series is wrong. Find out the wrong term. 7, 9, 17, 42, 91, 172, 293 [3947]

Q) one term in the number series is wrong. Find out the wrong term.
7, 9, 17, 42, 91, 172, 293

Options:
A)9
B) 17
C) 42
D) 91

Answer

A) 9 | Explanation:If 8 is written is place of 9, then the difference of two consecutive terms will be(1)^2, (3)^2, (5)^2, (7)^2, (9)^2 and (11)^2 respectively.

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