1. Listing Method
A common multiple of two numbers is a number that is a multiple of both numbers. Suppose we want to find common multiples of 10 and 25. We can list the first several multiples of each number. Then we look for multiples that are common to both lists
2. Factor Tree
It is an intuitive method to understand the factors of a number. It shows how all the factors are been derived from the number. It is a special diagram where you find the factors of a number, then the factors of those numbers, etc until you can't factor anymore.
3. Continuous Division
To find the LCM by division method, we write the given numbers in a row separately by commas, then divide the numbers by a common prime number.
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