Multiple Choice Questions

Three number are in the ratio of 3 4 5 and their L C M is 2400 Their H C F is ........

Quantitative Aptitude (Punjab Allied ) LCM, HCF

Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is:

120

200

Let the numbers be 3x, 4x and 5x.

Then, their L.C.M. = 60x.

So, 60x = 2400 or x = 40.

The numbers are (3 x 40), (4 x 40) and (5 x 40).

Required H.C.F. = 40.

Hence, option 1 is the correct answer.

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