Finding Factors

Which pair of numbers has a GCF of 3?

• 3 and 18
• 8 and 24
• 12 and 18
• 1 and 3

What is the greatest common factor of 20 and 16?

• 8
• 4
• 2
• 5

What are the factors for 12?

• 1, 12

• 1, 2, 3, 4, 6, 8, 12

• 1, 2, 3, 4, 6, 12

• 2, 3, 4, 6

Tags

CCSS.4.OA.B.4

What are the factors for 25?

• 1, 2, 3, 5, 12, 25

• 1, 5, 25

• 5,25

• 1, 3, 5, 25

Tags

CCSS.4.OA.B.4

What type of number is 23?

• composite

• prime

Tags

CCSS.4.OA.B.4

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Tags

CCSS.4.OA.B.4

Find the greatest common factor of 20 and 30

• 2
• 5
• 10
• 15

Check ALL factor pairs for 62.

• 1 and 62

• 2 and 30

• 2 and 31

• 3 and 19

• 4 and 15

Tags

CCSS.4.OA.B.4

Check ALL factors of 10?

• 1

• 2

• 3

• 4

• 5

Tags

CCSS.4.OA.B.4

Which are the factors of the number 20.

• 1, 2, 4, 5, 10, 20

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20

• 1, 2, 10, 20

• 2, 10, 4, 5

Tags

CCSS.4.OA.B.4