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

  • question_answer
    Find the smallest natural number by which 1458 must be divided so that the quotient is a perfect cube.

    A)  4                                

    B)  2        

    C)  6                    

    D)         8

    Correct Answer: B

    Solution :

    \[1458=2\times \underline{3\times 3\times 3}\times \underline{3\times 3\times 3}\] Here 2 is unpaired. So, 1458 must be divided by 2 to make it a perfect cube.
    2 1458
    3 729
    3 243
    3 81
    3 27
    3 9
    3 3
    1


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