Subject

    Quantitative Aptitude

    Topic

    Number

    What should come in place of question mark (?) in the following number series? 1    9    25    49    81    ?    169

    ক)
    100
    খ)
    64
    গ)
    81
    ঘ)
    121
    ঙ)
    None of these

    Explanation

    The pattern of the given series is, → 1 = 1 2 , → 9 = 3 2 , → 25 = 5 2 , → 49 = 7 2 , → 81 = 9 2 , ∵ we can that it is series of square of odd numbers , ∴ ? = 11 2 , So, ? = 121

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