All numbers where the digit sum is divisible by 3 are divisible by 3. For example, 54 is divisible by 3 because 5 + 4 = 9 and 9 is divisible by 3.

A factor tree is a great tool you can use to factorize numbers. The times tables are an important element in this process. Learn more by watching this video!

How Do You Factorize with a Factor Tree?  

Practice using a factor tree to factorize numbers on the next page.

Integer greater than 1 that is only divisible by 1 and itself.

An integer greater than 1 that is the product of two or more prime numbers.

Every number in a multiplication problem that is multiplied is called a factor.

The result of multiplying numbers together.