Prime Factorization and Greatest Common Factor

Find the GCF of 16 and 36

• 144

• 48

• 4

• None of these match my answer

Find the GCF of 39 and 26

• 13

• 1

• 78

• None of these match my answer

Use a factor tree to find the prime factorization of 32

• 2x2x2x4

• 2x2x2x2x2

• 4x4x2

• 2x2x2x2x1

Use a number tree to find the prime factorization of 42

• 4x4x3

• 6x7

• 7x3x2

• 5x4x2

Find the GCF of 64 and 144

• 8

• 6

• 16

• 2

What is the GCF of 18 and 24?

• 3

• 6

• 8

• 9

What is the missing factor?

• 1

• 2

• 5

• 8

What are the missing factors?

• 2 and 3

• 3 and 6

• 3 and 3

• 1 and 9

Use a factor tree to find the prime factorisation of 168

What is the GCF of 4 and 12?

• 3

• 1

• 6

• 4