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SSC Sample Paper Mock Test-3 SSC CGL Tear-II Paper-1

  • question_answer
    The HCF of two numbers is 1 /5th of their LCM. If the product of the two numbers is 720, then the HCF of the numbers is

    A)  13                               

    B)  12  

    C)  14                               

    D)  18

    Correct Answer: B

    Solution :

    Let LCM = 5x, then HCF = x Now, product of numbers = 720 (\[\therefore \]HCF \[\times \] LCM= Product of the numbers) So, here \[(5x)\,\,x=720\] \[\Rightarrow \]   \[5{{x}^{2}}=720\] \[\Rightarrow \]   \[{{x}^{2}}=144\] \[\therefore \]      \[x=12\]   


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