Prime Number Factor Trees and Gcf

What is the GCF of 24 and 56?

What is the GCF of 36 and 90?

What is the GCF of 45 and 75?

What is the GCF of 15, 30, and 45?

GCF of: 
14 and 20

• 7

• 28

• 2

• 6

GCF of: 
5 and 7

• 1

• 3

• 5

• 7

To break down 2 numbers using prime factorization trees and find what they have in common is ...

What is the prime factorization of 30 (tree)?

• 2 x 15

• 1 x 30

• 3 x 15

• 2 x 3 x 5

What is the GCF of 12 and 10 (prime factorization tree)?

• 10

• 2

• 6

• 5

What is the prime factorization of 42 (tree)?

• 2 x 28

• 1 x 42

• 2 x 3 x 7

• 6 x 7