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Banking Quantitative Aptitude Sample Paper Quantitative Aptitude Sample Paper-50

  • question_answer
    Which of the following is a perfect square as well as a cube?                                     [SSC (CGL) 2015]
    343, 125, 81 or 64

    A) 81                                

    B) 343   

    C) 125                              

    D) 64

    Correct Answer: D

    Solution :

    \[343=7\times 7\times 7={{7}^{3}}\]\[\Rightarrow \]\[125={{5}^{3}}\]\[\Rightarrow \]\[81={{3}^{4}}\]
    \[64=8\times 8={{8}^{2}}\]or \[{{(4)}^{3}}\]
    \[\therefore \]64 is a perfect square of 8 as well as a perfect cube of 4.


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