GCF

Front

What is the GCF?

Back

The Greatest Common Factor (GCF) is the largest number that divides two or more 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 they have in common.

Front

What is the GCF of 20 and 30?

Back

10

Front

What is the GCF of 12 and 18?

Back

6

Front

What is the GCF of 28 and 42?

Back

14

Front

What is the GCF of 15 and 25?

Back

5

Front

What is the GCF of 36 and 60?

Back

12

Front

What is the GCF of 48 and 64?

Back

16

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

How can prime factorization help in finding the GCF?

Back

By breaking down each number into its prime factors, you can multiply the lowest powers of common prime factors to find the GCF.