Question

what is LCM? how it is used

Answer 1

HI HERE IS YOUR ANSWER
LCM MEANS LOWEST COMMON MULTIPLE .IT IS USED TO FIND THE LOWEST AND COMMON MULTIPLE .

Answer 2

Least Common Factor (LCM)

The LCM of two or more  given numbers is the least number which is exactly divisible by each one of them.

Example :- 10 is the common multiple of 2 and 5

                  35 is the common multiple of 5 and 7 etc.  

Methods for finding LCM

( i )  By Factorization method

      According to this method, firstly we have to write down the prime factors of the given number. Then, the LCM is the product of the highest powers of all the factors.

( ii ) By Prime Factors Method

      According to this method, firstly we have to resolve the given numbers into their prime factors and then find the product of the highest power of all the factors that occur in the given numbers.