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SSC Quantitative Aptitude LCM & HCF Question Bank LCM and HCF (I)

  • question_answer
    Three numbers are in the ratio 3 : 4 : 5 and their LCM is 2400. Their HCF is

    A) 0

    B) 80

    C) 120

    D) 200

    Correct Answer: A

    Solution :

    [a] Let the numbers be 3x, 4x and 5x Then, \[LCM=60x\] \[60x=2400\]\[\Rightarrow \]\[x=40\] \[\therefore \] The numbers are 120, 160 and 200. Clearly, their HCF is 40.


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