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LCM and HCF

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  1. The ratio of two numbers is 3 : 4 and their HCF is 5. Their LCM is :
    1. 10
    2. 60
    3. 15
    4. 12
Correct Option: B

If the numbers be 3p and 4p, then
HCF = p = 5
∴ Numbers = 3p = 3 × 5 = 15 and 4p = 4 × 5 = 20
∴ LCM = 60


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