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Railways Sample Paper RRB (Group D) Sample Test Paper-3

  • question_answer
    What is the smallest value that must be added to 709, so that the resultant is a perfect square?

    A)  8                    

    B)  12

    C)  20                   

    D)  32

    Correct Answer: C

    Solution :

    [c] According to question \[26<\sqrt{709}<27\] Now, \[{{(27)}^{2}}=729\] \[\therefore \,\,\,729-\,709=20\] \[\therefore \] 20 must be added to 709 to make it a perfect square.


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