2. Sample Papers
  3. Railways
  4. Quantitative Aptitude
  5. LCM & HCF

Railways Quantitative Aptitude LCM & HCF Sample Paper HCF and LCM Sample Test Paper-2

  • question_answer
    Three numbers are in the ratio 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F is

    A)  40                   

    B)  80      

    C)  120                 

    D)  200

    Correct Answer: A

    Solution :

    [a] Let the number 3 x, 4 x and 5 x. So, LCM (3 x, 4 x, 5 x) = 60 x 60 x = 2400 x = 40 Hence three numbers are 3 \[\times \]40, 4 \[\times \]40 and 5\[\times \]40 Since the HCF means highest common factor. So, the HCF = 40


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