GCF and LCM

Front

What is the GCF (Greatest Common Factor)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

What is the LCM (Least Common Multiple)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of all of them.

Front

How do you find the GCF of two numbers?

Back

List the factors of each number and identify the largest factor they have in common.

Front

How do you find the LCM of two numbers?

Back

List the multiples of each number and identify the smallest multiple they have in common.

Front

What are the factors of 30?

Back

1, 2, 3, 5, 6, 10, 15, 30

Front

What are the multiples of 4 up to 40?

Back

4, 8, 12, 16, 20, 24, 28, 32, 36, 40

Front

Find the GCF of 12 and 16.

Back

The GCF is 4.

Front

Find the LCM of 3 and 5.

Back

The LCM is 15.

Front

If the GCF of two numbers is 1, what does that mean?

Back

It means the two numbers are coprime, having no common factors other than 1.

Front

What is the relationship between GCF and LCM?

Back

The product of the GCF and LCM of two numbers is equal to the product of the numbers themselves.