Question

Find hcf if product of two numbers is 720 and their lcm is 36

Answer 1

Given product of two numbers are 720
And LCM of two numbers are 36
We know that-
LCM × HCF = Product of two numbers
36 × HCF = 720
Therefore HCF = 720/36
=20

Answer 2

let the two numbers are a and b
a*b = 720
lcm(a,b) =36
hcf(a,b) =?
hcf(a,b) *lcm(a,b) = a*b
hcf(a,b) = (a*b)/lcm(a,b)

= 720/36
=20