GCF and Prime Factorization

Prime or Composite?

39

• Prime (only 1 x 39)

• Composite (1 x 39 and 3 x 13)

Prime or Composite?

81

• Prime (only 1 x 81)

• Composite (1 x 81, 3 x 27, and 9 x 9)

Prime or Composite?

5

• Prime (only 1 x 5)

• Composite (1 x 5 and 2 x 3)

11 is _________

• Prime (only has two factors)

• Composite (has more than two factors)

33 is a ___________ number.

• Prime

• Composite

Which of these numbers is not prime?

• 17
• 25
• 23
• 37

Tags

TEKS.MATH.5.4A

Find the prime number.

• 10
• 9
• 7
• 4

Tags

CCSS.4.OA.B.4

GCF of 8 and 20

• 8
• 2
• 4
• 10

Tags

CCSS.4.OA.B.4

What is the GCF (Greatest Common Factor)

of 12 and 20

• 1

• 2

• 4

• 5

What is the Greatest Common Factor of 48 and 32 and 16

• 1

• 2

• 16

• 48