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

  • question_answer
    The value of HCF \[(8,9,25)\times LCM(8,9,25)\] is:

    A) 500

    B) 1800     

    C) 1810

    D) 1500

    Correct Answer: B

    Solution :

    Sol.      [b] We have,      \[8=2\times 2\times 2,\]
                                        \[9=3\times 3,\,25=5\times 5\]
    \[HCF(8,9,25)=1\]and
    \[LCM(8,9,25)={{2}^{3}}\times {{3}^{2}}\times {{5}^{2}}=1800\]
    \[\therefore \,\,\,\,\,\,HCF(8,9,25)\times LCM(8,9,25)=1\times 1800=1800\]


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