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What should come in place of '?' in the given series? 21, 60, 177, 528, 1581, ? ​​
Question

What should come in place of '?' in the given series?
21, 60, 177, 528, 1581, ? ​​

A.

4636

B.

4740

C.

4892

D.

4570

Correct option is B

Given: The series 21, 60, 177, 528, 1581, ?.
Logic: × 3 - 3
21 × 3 = 63 → 63 - 3 = 60
60 × 3 = 180 → 180 - 3 = 177
177 × 3 = 531 → 531 - 3 = 528
528 × 3 = 1584 → 1584 - 3 = 1581
1581 × 3 = 4743 → 4743 - 3 = 4740
Correct answer is (b)

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