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Railways R.R.C. (Patna) Solved Paper Held on 1st_Shift 23-11-2014

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

    A) 120                              

    B) 40

    C) 80                                

    D) 200

    Correct Answer: B

    Solution :

    Suppose numbers are 3, 4x and 5x. Then,    \[LCM=3\times 4\times 5\times x\] \[=60x\] Now,     \[60x=2400\] \[x=40\] Hence,  \[HCF=x=40\]


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