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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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