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Discussion :: Number Series

  1. What will come at the place of question mark ?
    1, 9, 25, 49, ?, 121.

    2. A.

     100
    B.

     91
    C.

     64
    D.

     81

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    Answer : Option D

    Explanation :

    12 = 1.
    32 = 9.
    52 = 25.
    72 = 49.
    92 = 81.
    112 = 121.

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