Question

The H.C.F. and L.C.M. of two numbers are 6 and 280 respectively if one of the number is 30 find the other number.

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Answer 1

168.

Explanation:

H.C.F. = 6 = 2 by 3.

L.C.M. = 280 = 2^3 by 5 by 7.

30 = 2 by 3 by 5.

x = 2^3 by 3 by 7 = 168.

I used the factorisation method.