Prime Factorization and Greatest Common Factor

Write 78 as a product of its prime factors.

• 2 x 39

• 2 x 3 x 13

• 6 x 13

• 2 x 3 x 3 x 4

Sara had 16 red flowers and 24 yellow flowers.  She wants to make bouquets with the same number of each color flower in each bouquet.  What is the greatest number of bouquets that she can make?

• 4

• 2

• 48

• 8

The Greatest Common Factor of two prime numbers is

• 0

• 1

• There are no common factors.

• Themselves.

Find the Greatest Common Factor (GCF) of 60 and 75

• 1

• 3

• 5

• 15

Find the Greatest Common Factor (GCF) OF 12,  18 & 30

• 1

• 3

• 6

• 12

Find the prime factorization of 40

• 2 x 5 x 2

• 2 x 20

• 5 x 8

• 2 x 2 x 2 x 5

What is the prime factorization of 15?

• 3x3x3

• 2x2x5

• 15

• 3x5

Find the prime factorization of 60

• 5 • 12

• 2 • 3² • 5

• 2² • 3 • 5

• 2⁷

What is the greatest common factor of 60 and 75

• 2

• 5

• 15

• 25

What is the greatest common factor of 36 and 54

• 2

• 6

• 9

• 18