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

  • question_answer
    The number \[(\sqrt{2}-\sqrt{3})\,\,(\sqrt{2}+\sqrt{3})\] will be:

    A) rational

    B) irrational

    C) whole number

    D) None of these

    Correct Answer: A

    Solution :

    Sol.      [a] Since, \[(\sqrt{2}-\sqrt{3})\,\,(\sqrt{2}+\sqrt{3})={{(\sqrt{2})}^{2}}-{{(\sqrt{3})}^{2}}=-1,\] which is a rational number.


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