1. The formula of HCF and LCM is: Product of two numbers = LCM of two numbers x HCF of two numbers. The following formulas can be deduced from the HCF and LCM Formula. HCF of two numbers = Product of two numbers/ LCM of two numbers.
2. Say, A and B are the two numbers, then as per the formula; A x B = H.C.F.(A, B) x L.C.M.(A, B) NOTE- The above relation between H.C.F and L.C.M is not valid for the product of numbers greater than 2. It is only valid for the product of two numbers.
3. We can find HCF and LCM of given natural numbers by two methods i.e., by prime factorization method or division method. In the prime factorization method, given numbers are written as the product of prime factors.