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

  • question_answer
    The HCF and LCM of two numbers are 21 and 84, respectively. If the ratio of the two numbers is  1 : 4, then the larger of the two numbers is [SSC CGL Tier II, 2015]

    A) 48

    B) 12

    C) 84

    D) 108

    Correct Answer: C

    Solution :

    [c] Let the small number is x and large number is 4x Then, \[x\times 4x=21\times 84\]\[\Rightarrow \]\[4{{x}^{2}}=21\times 84\] \[\therefore \]      x = 21 Then, the required large number \[=21\times 4=84\]


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