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    What should come in place of the question mark (?) in the given series?42, 57, 72, 87, 102, ?
    Question

    What should come in place of the question mark (?) in the given series?
    42, 57, 72, 87, 102, ?

    A.

    108

    B.

    115

    C.

    117

    D.

    121

    Correct option is C

    Series: 42, 57, 72, 87, 102, ?
    Logic: Each number increases by 15:
    42 + 15 = 57
    57 + 15 = 72
    72 + 15 = 87
    87 + 15 = 102
    So,
    102 + 15 = 117
    Thus, correct option is (b).

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