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

  • question_answer
    Find the least number by which 3087 must be multiplied to make it a perfect cube.

    A)  3     

    B)  4           

    C)  9                                

    D)  7

    Correct Answer: A

    Solution :

    (a) \[3087=3\times 1029\] \[=3\times 3\times 343\] \[=3\times 3\times {{7}^{3}}\] If we multiplying by 3, We have \[{{3}^{3}}\times {{7}^{3}}\] perfect cube. Ans = 3.


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