Question

find the hcf and lcf of 90 and 144 by the method of prime factoriation

Answer 1

90 = 3 x 3 x 2 x 5.

144 = 2 x 2 x 2 x 2 x 3 x 3

H.C.F( 90, 144) = 2 x 3 x 3 = 18.

L.C.M( 90, 144) = 2 x 2 x 2 x 2 x 3 x 3 x 5 = 720.

Hope it helps you.