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CLAT Sample Paper CLAT Sample Paper-12

  • question_answer
    If x is a natural number which is a perfect square, then the number \[x+\sqrt{x}\] must end in

    A)  0 or 5              

    B)  0 or 1 or 9                   

    C)  0 or 2 or 6        

    D)         0 or 4 or 8       

    Correct Answer: C

    Solution :

    \[1+\sqrt{1}=2\] \[4+\sqrt{4}=6\] \[9+\sqrt{9}=12\] \[16+\sqrt{16}=20\] \[25+\sqrt{25}=30\] \[36+\sqrt{36}=42\] Thus, we get the unit digits as 0, 2 and 6.


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