Finding the Greatest Common Factor

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

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 are the factors of 25?

• 1, 2, 3, 5, 10, 15, 25
• 1, 5,  25
• 1, 25
• 1, 5

Tags

CCSS.4.OA.B.4

What is the GCF of 36 and 24?

• 6

• 12

• 8

• 9

Tags

CCSS.6.NS.B.4

GCF of 8 and 20

• 8
• 2
• 4
• 10

Tags

CCSS.4.OA.B.4

List the factors of 12 & 20, then identify the greatest common factor.
12-
20-
GCF=

• 12- 1, 2, 5, 7  20-10, 20, 30, 40 GCF 10
• 12-1, 12, 24, 36  20-20, 40, 60, 80 GCF 40
• 12-2, 4, 6   20-1, 10, 20 GCF 20
• 12-1, 2, 3, 4, 6, 12  20-1, 2, 4,5,10, 20 GCF 4

Tags

CCSS.4.OA.B.4

What is the greatest common factor of 4 and 8?

• 2
• 8
• 4
• 1

Tags

CCSS.4.OA.B.4

Greatest common factor of 9 and 15

• 5

• 4

• 3

GCF of 20 and 80

• 10

• 20

• 5

• 40

• Not Given

Tags

CCSS.6.NS.B.4

Sara had 16 red flowers and 24 yellow flowers. She wants to make bouquets with the same number of each color flower in each bouquet. What is the greatest number of bouquets that she can make?

Hint: Find the GCF

• 4

• 2

• 48

• 8