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10th Class Mathematics Real Numbers Question Bank MCQs - Real Numbers

  • question_answer
    The smallest number by which \[\sqrt{27}\] should be multiplied so as to get a rational number, is:

    A) \[\sqrt{27}\]

    B) \[3\sqrt{3}\]

    C) \[\sqrt{3}\]

    D) 3

    Correct Answer: C

    Solution :

    Sol.      [c] Since, \[\sqrt{27}=3\sqrt{3}.\] So, we multiply it by \[\sqrt{3}\] to get a rational number i.e., \[3\sqrt{3}\times \sqrt{3}=9.\]


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