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Problems on HCF and LCM - General Aptitude

Q1:

The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is:

A 12

B 16

C 24

D 48

ANS:D - 48

Let the numbers be 3x and 4x. Then, their H.C.F. = x. So, x = 4. So, the numbers 12 and 16. L.C.M. of 12 and 16 = 48.