- Product of two numbers =LCM×HCF
- LCM=product of two numbers÷HCF
- HCF =product of two numbers÷LCM
- (HCF×LCM)÷one of the numbers=The other numbers
- The HCF is never greater than the LCM .
- The LCM is never less than any of the two numbers.
- The HCF of two coprime number is 1.
- The LCM of two coprime numbers is their product.