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    Select the number from among the given options that can replace the question mark (?) in the following series. 63, 78, 108, 153, ?
    Question

    Select the number from among the given options that can replace the question mark (?) in the following series.
    63, 78, 108, 153, ?

    A.

    185

    B.

    213

    C.

    193

    D.

    207

    Correct option is B

    Analyzing the series:
    63,78,108,153,?
    The differences:
    78-63=15
    108-78=30
    153-108=45
    The differences increase by 15 each time:
    153+60=213
    Therefore, the correct answer is (b) 213.


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