Prime Factorization

Which of the following are all prime numbers?

• 2, 3, 6, 7, 9

• 2, 4, 8, 16

• 2, 3, 5, 7, 9

• 2, 3, 5, 7, 11

Which is the prime factorization of 12? 

• 2 x 6
• 2 + 2 + 2 + 2 + 2 + 2 
• 2² x 3
• 1 x 2² x 3

Tags

CCSS.4.OA.B.4

Use a Factor Tree to find the prime factorization of 24.

• 2³ x 3

• 2² x 3 x 4

• 2² x 3

• 3 x 8

Use a Factor Tree to find the prime factorization of 33.

• 33

• 11x3

• 10x3

• 3x3x3x2

Use a Factor Tree to find the prime factorization of 18.

• 3x2x2

• 3x3x3

• 33x3

• 3x3x2