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SSC Sample Paper SSC CGL - Sample Paper-19

  • question_answer
    Sum of digits of the smallest number by which 1440 be multiplied so that it becomes a perfect cube, is

    A) 4                                 

    B) 6

    C) 7                                 

    D) 8

    Correct Answer: B

    Solution :

    \[1440=2\times 2\times 2\times 2\times 2\times 5\times 3\times 3\times 2\] \[\therefore \] It should be multiplied by \[5\times 5\times 3\times 2\] i.e., 150 so that it becomes perfect cube. \[\therefore \] Sum of digits \[=1+5+0=6\]


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