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10th Class Mathematics Real Numbers Question Bank Case Based MCQs - Real Number

  • question_answer
    Shallu picked up 'BONUS' and her question was-Which of the following is not irrational?

    A) \[5-3\sqrt{2}\]

    B) \[\sqrt{5}-2\]

    C) \[2+2\sqrt{9}\]

    D) \[3\sqrt{5}-6\]

    Correct Answer: C

    Solution :

    Here,  \[\sqrt{9}=3\] (which is a rational number)
    \[\therefore \,\,2+2\sqrt{9}=2+2\left( 3 \right)\]
    \[=2+6=8\]
     8 is not an irrational number.
     


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