GCF Prime Factorization

Use a number tree to find the prime factorization of 18

• 3x2x2

• 3x3x3

• 33x3

• 3x3x2

Find the prime factorization of 81

• 2² • 7

• 2³ • 5 • 7

• 4³

• 3⁴

What is the GCF of 20 and 30?

• 5

• 2

• 10

• 20

Maya 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

Use a number tree to find the prime factorization of 48

• 4x2x6

• 4x2²x3

• 3x2⁴

• 12x4

What is the greatest number of bags she can make and have no stickers and pencils left over?

• The greatest number of bags is 18

• The greatest number of bags is 6

• The greatest number of bags is 9

• The greatest number of bags is 27

Two bands are marching in a parade. There are 32 people in the first band. There are 40 people in the second band. The same number of people are marching in each row in both bands. What is the greatest number of people that could be marching in each row?

• The greatest common factor is 2

• The greatest common factor is 10

• The greatest common factor is 4

• The greatest common factor is 8

Adam is trying to find the greatest number of gift bags he can give to his friends. He wants the same amount of toy dinosaurs and stickers in each bag. If he has 30 toy dinosaurs and 20 stickers, what does he need to find? How many dinosaurs and stickers will be in each bag?

• Greatest Common Multiple; 3 dinosaurs and 2 stickers

• Greatest Common Factor; 3 dinosaurs and 2 stickers

• Greatest Common Factor; 6 dinosaurs and 4 stickers

• Least Common Multiple; 60 dinosaurs and 60 stickers

What is the greatest common factor of 24 and 36?

• 2

• 3

• 12

• 24

Find the prime factorization for 36

• 2^2 x 3^3

• 2 x 7

• 2^2 x 3^2

• 3^2 x 2^3