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Railways R.R.C. (Hazipur) Solved Paper Held on 1-12-2013

  • question_answer
    The H.C.F. of 42,63 and 140 is-

    A) 14                                

    B) 7

    C) 9                                 

    D) 21

    Correct Answer: B

    Solution :

    \[42=2\times 3\times 7\] \[63=3\times 3\times 7\] \[140=2\times 2\times 5\times 7\] Hence, HCF = 7


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