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  1. The H.C.F. and L.C.M. of two numbers are 21 and 84 respectively. If the ratio the two numbers is 1 : 4, then the larger of the two numbers is
    1. 12
    2. 108
    3. 48
    4. 84
Correct Option: D

HCF of numbers = 21
∴ Numbers = 21p and 21q Where p and q are prime to each other.
Ratio of numbers = 1 : 4
∴ Larger number = 21 × 4 = 84



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