Question

The product of two numbers x y is 217728. Find the LCM HCF of x y if it is given that LCM(x,y) = 42.HCF (x,y).

Answer 1

$lcm \times hcf = x \times y \\ 42 \times hcf = 217728 \\ hcf = 5184$

Answer 2

xy=217728
LCM=42
X×Y=HCF×LCM

217728=HCF×42

217728/42=HCF
5184=HCF