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    Which of the following numbers will replace the question mark (?) in the given series?9 , 10 , 18 , 45 , 109 , ?
    Question

    Which of the following numbers will replace the question mark (?) in the given series?

    9 , 10 , 18 , 45 , 109 , ?

    A.

    327

    B.

    234

    C.

    198

    D.

    218

    Correct option is B

    Given: 9 , 10 , 18 , 45 , 109 , ?
    Logic: Difference of two constitutive number is increasing from 1, 8, 27, 64, 125
    (which is cube of respective numbers 1, 2, 3, 4, 5)
    Explanation:
    10-9=1
    18-10=8
    45-18=27
    109-45=64
    Similarly,
    ?-109=125
    ?=125+109
    ?=234
    Thus, Option B is the correct answer.

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