GCF and LCM

Front

What is the Greatest Common Factor (GCF)?

Back

The GCF is the largest positive integer that divides all the given numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

To find the GCF, list the factors of each number and identify the largest factor that appears in both lists.

Front

What is the Least Common Multiple (LCM)?

Back

The LCM is the smallest positive integer that is a multiple of two or more numbers.

Front

How do you find the LCM of two numbers?

Back

To find the LCM, list the multiples of each number and identify the smallest multiple that appears in both lists.

Front

What is the GCF of 12 and 36?

Back

The GCF of 12 and 36 is 12.

Front

What is the LCM of 4 and 5?

Back

The LCM of 4 and 5 is 20.

Front

If Lisa has 12 coloring books and 36 crayons, what is the greatest number of baskets she can make?

Back

12 baskets.

Front

What is the GCF of 28y² and 49y²?

Back

The GCF is 7y².

Front

What is the LCM of 42xy² and 28x³y?

Back

The LCM is 84x³y².

Front

If Jeremy has two pieces of wood measuring 90 inches and 72 inches, what is the longest piece he can cut without leftovers?

Back

18 inches.