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8th Class Mathematics Cubes and Cube Roots Question Bank Cubes and Cube Roots

  • question_answer
    The smallest number by which 392 must be multiplied so that the product is a perfect cube, is ____.

    A)  3                                

    B)         5        

    C)         7                    

    D)         9

    Correct Answer: C

    Solution :

    We have, 392 = \[2\times 2\times 2\times 7\times 7\] So, 392 must be multiplied by 7 to make it perfect cube.
    2 392
    2 196
    2 98
    7 49
    7 7
    1


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