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10th Class Mathematics Real Numbers Question Bank Real Numbers

  • question_answer
    What is the L.C.M. of 140 and 605 if their H.CF. is H?

    A)  8000                     

    B)         5500

    C)  8400                                     

    D)  7700

    Correct Answer: D

    Solution :

     The product of two numbers = The product of their L.C.M. and H.C.F. \[\frac{6}{14}and\frac{2}{7}\]     \[\Rightarrow \] \[\frac{L.C.M.(6,2)}{H.C.F.(14,7)}=\frac{6}{7}\]   \[\text{7}\times \text{13}+\text{13}=\text{1}0\text{4}=\text{23}\times \text{13}\]


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