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

  • question_answer
    HCF of two numbers is 27 and their LCM is 162. If one of the number is 54, then the other number is:   (CBSE 2020)

    A) 36

    B) 35

    C) 9

    D) 81

    Correct Answer: D

    Solution :

      
    Sol.      [d] \[a\times b=HCF(a,b)\times LCM(a,b)\]
    \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,54\times b=27\times 162\]
    \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,b=81\]


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