GCF and Prime Factorization Review

What are all of the factors of 12?

• 1 and 12

• 1, 2, 3, 4, & 6

• 1, 2, 3, 4, 6, & 12

• 1, 2, 3, 4, 6, 10, & 12

• 12, 24, 36, 48, 72 , 84...

Tags

CCSS.4.OA.B.4

What is the GCF of 18 and 24?

• 3

• 6

• 8

• 9

Tags

CCSS.6.NS.B.4

Which pair of numbers has a GCF of 8?

• 8, 36

• 40, 80

• 16, 56

• 24, 42

Tags

CCSS.6.NS.B.4

What is the greatest factor of 28 and 49?

• 1
• 2
• 7
• 12

Tags

CCSS.6.NS.B.4

What is the GCF of 20 and 30?

• 5
• 2
• 10
• 20

Tags

CCSS.6.NS.B.4

Which pair of numbers have a GCF of 3?

• 15 and 27

• 20 and 30

• 45 and 15

• 9 and 18

Tags

CCSS.6.NS.B.4

What is the GCF of 9 and 15?

• 1

• 3

• 6

• 8

Tags

CCSS.6.NS.B.4

What is the GCF of 12 and 30?

• 2

• 4

• 6

• 8

• 12

Tags

CCSS.6.NS.B.4

A composite number

• has more than 2 factors
• has one factor
• has at least 10 factors
• is always a really big number

Tags

CCSS.4.OA.B.4

Select all of the numbers that are prime numbers

• 15

• 7

• 9

• 2

• 13

Tags

CCSS.4.OA.B.4