Greatest Common Factor Review

Using a factor tree, turn this number into a prime factorization.
20

• 10x2
• 5x4
• 5x2x2
• 10x4

Which is a factor of 15?

• 2

• 3

• 4

• 6

Tags

CCSS.4.OA.B.4

GCF of 20 and 35

• 4
• 5
• 7
• 20

Tags

CCSS.6.NS.B.4

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

Tags

CCSS.4.OA.B.4

What is the GCF of 4 and 12?

• 3
• 1
• 6
• 4

Tags

CCSS.6.NS.B.4

GCF of 28 and 40

• 2
• 4
• 7
• 8

Tags

CCSS.6.NS.B.4

What is the greatest common factor of 8 and 10?

• 1
• 3
• 4
• 2

Tags

CCSS.6.NS.B.4

What is the greatest common factor of 6 and 21?

• 6
• 2
• 3
• 7

Tags

CCSS.6.NS.B.4

What is the GCF of 18 and 24?

• 3
• 6
• 8
• 9

Tags

CCSS.6.NS.B.4

Find the greatest common factor of 20 and 30.

• 2

• 5

• 10

• 15