Prime Factorization and Prime or Composite Numbers

Use a factor tree to find the prime factorization of 33

• 33

• 11x3

• 10x3

• 3x3x3x2

What number has the prime factorization of 2³ • 11?

• 55

• 66

• 88

• 99

Select all of the prime numbers.

• 1

• 2

• 7

• 18

• 21

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 105

• 7x5x3

• 11x5x3

• 7x5x2x1

• 7x5x3x2

Use a number tree to find the prime factorization of 32

• 2 x 2 x 2 x 4

• 2 x 2 x 2 x 2 x 2

Use a number tree to find the prime factorization of 60

• 5 x 3 x 2 x 2

• 7 x 6 x 5

Use a number tree to find the prime factorization of 42

• 4 x 4 x 3

• 7 x 3 x 2

Use a number tree to find the prime factorization of 64

• 2 x 2 x 2 x 2 x 2 x 2

• 4 x 4 x 2 x 2

Use a number tree to find the prime factorization of 72

• 2 x 2 x 2 x 3 x 3

• 4 x 3 x 3 x 2

Tags

CCSS.4.OA.B.4

Use a number tree to find the prime factorization of 18

• 3 x 3 x 2

• 3 x 3 x 3