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  1. Which one of the following can't be the square of natural number ?

    2. A.

    32761
    B.

    81225
    C.

    42437
    D.

    20164
    E.

    None of these

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    Answer : Option C

    Explanation :

    The square of a natural number never ends in 7.

    42437 is not the square of a natural number.

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