Greatest Common Factor

GCF of 28 and 40

• 2
• 4
• 7
• 8

GCF of 20 and 70

• 2
• 5
• 7
• 10

Which of the choices is not a factor of 24?

• 2
• 3
• 4
• 5

List all the factors of 12

• 1, 2, 3, 4, 6, 12
• 1, 2, 4, 12
• 1, 12
• 1, 2, 3, 4, 5, 6, 12

What is the GCF? 3x²-3x

• 3
• x
• 3x
• 1

What is the GCF? 5x²+20x

• 5
• x
• 5x
• 20x

Factor:
10x + 15

• 100x + 150
• 10(x + 5)
• 1(10x + 15)
• 5(2x + 3)

What is the GCF? 2x²-4x+8

• 2x
• 2
• x
• 1

Factor:
x² - 5x

• 1(x - 5)
• x(x - 5x)
• x(x - 5)
• x²(1 - 5)

What is the GCF of 18k and 15k³

• 3k²
• 3k³
• 3k
• 5k