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

  • question_answer
    If LCM of a and 18 is 36 and HCF of a and 18 is 2, then a=

    A) 2

    B) 3

    C) 4

    D) 1

    Correct Answer: C

    Solution :

    Sol.      [c] Product of two numbers \[=HCF\times LCM\] of two numbers
    \[\therefore \,\,\,\,\,\,\,\,\,\,\,a\times 18=2\times 36\,\,\,\,\,\Rightarrow \,\,\,a=\frac{72}{18}=4.\]


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