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Which of the following numbers will replace the question mark (?) in the given series? 3, 12, ?, 39, 57, 78
Question

Which of the following numbers will replace the question mark (?) in the given series?
3, 12, ?, 39, 57, 78

A.

19

B.

22

C.

20

D.

24

Correct option is D

3, 12, ?, 39, 57, 78
Following pattern is followed-

Therefore, the correct option is (d).

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