LCM and HCF


  1. The H.C.F of two numbers is 12 and their difference is also 12. The number are ?









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    The difference of requisite number must be 12 and each one must be divisible by 12, so the numbers are 84, 96.

    Correct Option: D

    The difference of requisite number must be 12 and each one must be divisible by 12, so the numbers are 84, 96.


  1. H.C.F of three numbers is 12. If they be in the ratio 1: 2: 3, the numbers are ?









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    Straight forward answer 12, 24, 36

    Correct Option: A

    Straight forward answer 12, 24, 36



  1. L. C . M of 2/7, 3/14 and 5/ 3 is ?









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    L. C . M of 2/7, 3/14 and 5/ 3 = ( LCM of 2, 3 and 5) / ( HCF of 7, 14 and 3)

    Correct Option: C

    L. C . M of 2/7, 3/14 and 5/ 3 = ( LCM of 2, 3 and 5) / ( HCF of 7, 14 and 3)
    = 30


  1. Which of the fractions 1/2, 3/7, 3/5, 4/9 is the smallest ?









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    3/7

    Correct Option: C

    3/7



  1. Which of the following is in descending order ?









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    7/9, 5/7, 3/5

    Correct Option: B

    7/9, 5/7, 3/5