LCM/GCF

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

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

Find the GCF of 50 and 40.

Back

10

Front

What are prime factors?

Back

Prime factors are the prime numbers that multiply together to give a certain number.

Front

What are the prime factors of 70?

Back

2 x 5 x 7

Front

Find the GCF of 25 and 15.

Back

5

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 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

Find the LCM of 4 and 5.

Back

20

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.