Factorization Finding the Greatest Common Factors

Find the GCF of 18 and 20

• 2

• 3

• 4

• 6

• 9

Finding which prime numbers multiply together to make the original number

• Greatest common factor (GCF)

• Prime Factorization

• Prime Number

• Composite Number

What are the factors of 12

• 1, 2, 3, 4, 6, 12

• 2, 3, 5, 6

• 6, 12

• 6, 6

• 8, 4

What is the Greatest Common Factor of 16 and 24?

• 2 x 3 = 6

• 2 x 2 x 2 = 8

• 3 x 2 x 4 = 24

• 2 x 3 x 2 = 12

What is the Greatest Common Factor of 9 and 36?

• 3 x 3 x 2 x 2 = 36

• 3 x 3 x 3 = 27

• 3 x 3 x 2 = 18

• 3 x 3 = 9

Find the Greatest Common Factor (GCF) of 18 and 45.

• 3 x 3 x 2 = 18

• 3 x 3 = 9

• 3 x 3 x 5 = 45

• 2 x 3 x 2 x 3 = 36

Find the GCF of 150 and 225.

• 2 x 3 x 3 x 3 x 5 = 270

• 2 x 3 x 3 x 5 = 90

• 3 x 5 x 5 = 75

• 3 x 3 x 3 x 5 = 135

2 x 8 = 16 is the Greatest Common Factor (GCF) of what numbers?

• 90 and 120

• 120 and 140

• 144 and 160

• 110 and 150

3 x 5 = 15 is the Greatest Common Factor (GCF) of what numbers?

• 30, 70 and 90

• 20, 80 and 100

• 45, 60 and 90

• 25, 45, and 85

2 x 2 x 2 x 3 is the Greatest Common Factor of what numbers?

• 12, 24 and 36

• 24, 48 and 72

• 24, 32 and 48

• 12, 32 and 72