LCM GCF Practice

Front

What is the definition of 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

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 they have in common.

Front

What is the definition of 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 LCM of two numbers?

Back

To find the LCM, list the multiples of each number and identify the smallest multiple they have in common.

Front

What is the GCF of 20 and 40?

Back

The GCF of 20 and 40 is 20.

Front

What is the GCF of 39 and 13?

Back

The GCF of 39 and 13 is 13.

Front

What is the LCM of 15 and 9?

Back

The LCM of 15 and 9 is 45.

Front

If Nancy practices her dances every 4, 6, and 9 days, how do you find when she will practice all three again?

Back

Find the LCM of 4, 6, and 9, which is 36 days.

Front

What is the GCF of 15, 10, and 30?

Back

The GCF of 15, 10, and 30 is 5.

Front

What is the LCM of 3 and 5?

Back

The LCM of 3 and 5 is 15.