The Lowest Common Multiple is the smallest positive integer that is divisible by all the given numbers without leaving a remainder. There are at least two methods you can use to find the LCM. You can use prime factorization or identify common factors.

When using prime factorization to find the LCM you first create a factor tree.

Next, write the prime numbers in a chart. For each column of similar numbers bring one number down. If you have more than one similar number in the column, only bring one number down. 

Multiply the numbers you bring down together.

This video will help.

Common Core Standard: 6.NS.B.4 6th Grade Math


How do you find the LCM of polynomials?

Follow these steps to find the LCM of polynomials

1. Factor

2. Write each factor, not duplicating the “common” ones.

3. Multiply these factors together.

Video tutorial LCM of Polynomials
This video works several example problems showing how to find the Least Common Multiple (LCM) of Polynomials