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8th Class Mental Ability Numbers Question Bank Number System

  • question_answer
    Find the cube root of 42875.

    A) 35    

    B)        25

    C) 15                       

    D)        20

    E) 32

    Correct Answer: A

    Solution :

    Explanation Option [a] is correct. The factors of \[42875=5\times 5\times 5\times 7\times 7\times 7\] \[\sqrt[3]{42875}=\sqrt[3]{\underline{5\times 5\times 5}\times \underline{7\times 7\times 7}}=5\times 7=35\]                   


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