7, 26, 63, 124, 215, 342, ? Options: A . &nbsp391 B . &nbsp421 C . &nbsp481 D . &nbsp511

7, 26, 63, 124, 215, 342, ?

Question

7, 26, 63, 124, 215, 342, ?

Options:

A . 391

B . 421

C . 481

D . 511

Answer: Option D
The terms of the given series are (23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1),.....
So, missing term = (83 - 1) = (512 - 1) = 511.

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