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    Which of the following numbers will replace the question mark (?) in the given series? 18, 23, 32, 37, 46, ?
    Question

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

    18, 23, 32, 37, 46, ?

    A.

    49

    B.

    51

    C.

    61

    D.

    57

    Correct option is B

    Given series: 18, 23, 32, 37, 46, ?
    Find the differences between consecutive terms:
    23 - 18 = 5
    32 - 23 = 9
    37 - 32 = 5
    46 - 37 = 9
    The differences alternate between 5 and 9. Following this pattern, the next difference should be 5.
    So, add 5 to the last term (46):
    46 + 5 = 51
    Therefore, the number that replaces the question mark is: (b) 51

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