Method of Finding the LCM by Division Method
Divide the numbers by prime numbers which is a common factor of at least two of the given numbers, write the dividend and carry forward the numbers which are not divisible, next we should have repeat all the steps till no two of the numbers has a common factor. The product of the divisors of all the steps and the remaining numbers is the LCM of the numbers.
Find the LCM of 72, 81 & 108
3 is a common factor of 9 & 12, 8 is carried forward.
here is no common factors
So, the LCM is = 3 X 3 X 3 X 4 X 2 X 3 X 1 = 648