GCF and LCM

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest multiple that is exactly divisible by each of the numbers.

Front

How do you find the LCM of two numbers?

Back

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

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (GCF) of two or more numbers is the largest number that divides each of the numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

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

Front

What is the LCM of 3 and 7?

Back

21

Front

What is the LCM of 7 and 5?

Back

35

Front

What is the GCF of 9 and 21?

Back

3

Front

What is the LCM of 7 and 10?

Back

70

Front

What is the LCM of 12 and 9?

Back

36

Front

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

Back

If the GCF of two numbers is 1, it means the numbers are coprime, meaning they have no common factors other than 1.