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5th Class Mathematics Factors and Multiples Question Bank Factors and Multiples

  • question_answer
    The L.C.M. of \[3,\,\,6\] and \[x\] is\[18\]. What is the possible value of\[x\]?

    A)  \[36\]                           

    B)                     \[6\]                

    C)                     \[18\]                           

    D)                     \[3\]                

    Correct Answer: B

    Solution :

    \[3\] \[3,\,\,6,\,\,x\]
    \[2\] \[1,\,\,2,\,\,\frac{x}{3}\]
    \[\frac{x}{6}\] \[1,\,\,1,\,\,\frac{x}{6}\]
    \[1,\,\,1,\,\,1\]
    Given that L.C.M, of\[3,\,\,6,\,\,x\]is\[18\]. \[\therefore \]L.C.M\[=3\times 2\times \frac{x}{6}=18,\,\,x=18\].


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