Which number replaces the question mark?

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Nishant Guru Asked on 1st August 2015 in Puzzles.
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  • 1 Answer(s)

    The answer is 16
    Logic,
    4-1=3
    9-4=5
    ?-9=x
    25-?=y
    36-25=11
    49-36=13
    64-49=15
    81-64=17
    So in each case the difference is 2. So  in place of x i will be 7(5+2) and in place of y it will be 9 (7+2)
    Hence
    ?-9=7
    => ?=16

    Raktim Baruah Curious Answered on 24th November 2015.
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