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Railways Sample Paper RRB (Group D) Sample Test Paper-13

  • question_answer
    The H.C.F and L.C.M of two numbers are 21 and 4641 respectively. If one of the numbers lies between 200 and 300, then the two numbers are

    A)  273, 357          

    B)  273, 361

    C)  273, 359          

    D)  273, 363

    Correct Answer: A

    Solution :

    [a] Product of the numbers \[=HCF\times LCM=21\times 4641\] \[=21\times 3\times 7\times 13\times 17\] \[=3\times 7\times 3\times 7\times 13\times 17\] \[\therefore \]The required numbers can be \[3\times 7\times 13\,\,and\,\,3\times 7\times 17=273\,\,and\,\,357\]


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