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What should come in place of the question mark (?) in the given series? 591, 592, 596, 605, 621, ?
Question

What should come in place of the question mark (?) in the given series?
591, 592, 596, 605, 621, ?

A.

641

B.

636

C.

646

D.

631

Correct option is C

Given:
591 592 596 605 621 ?

Logic:
To find the next number, observe the differences between consecutive terms:
592 − 591 = 1
596 − 592 = 4
605 − 596 = 9
621 − 605 = 16
The differences are: 1, 4, 9, 16, which are perfect squares (1², 2², 3², 4²).
Now, following this pattern, the next difference should be 5² = 25.

Explanation:
621 + 25 = 646

Final Answer:
646

Final Correct Option:
(C) 646

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