Greatest Common Factor
Find the GCF of 12 and 18.
6
1, 5, and 25.
Write the prime factorization of 48?
2 x 2 x 2 x 2 x 3
Samantha has 24 cookies, and her friend Jason has 36 cookies. They want to package the cookies into identical boxes, with the same number of cookies in each box and no cookies left over.
What is the greatest number of cookies they can put in each box?
12 cookies
What is the greatest common factor of 15 and 60?
15
Find the GCF of 45 and 60.
15
What are factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
What is the prime factorization for 60?
2 x 2 x 3 x 5
A school has 42 red chairs and 56 blue chairs. The principal wants to arrange the chairs into rows with the same number of chairs in each row, using only chairs of the same color in each row, and wants each row to have the same number of chairs.
What is the greatest number of chairs that can be in each row?
14 chairs
What are the factors of 22?
1, 2, 11, and 22.
Find the GCF of 24 and 36.
12
What are factors of 50?
1, 2, 5, 10, 25, and 50.
What is the prime factorization of 80?
2 × 2 × 2 × 2 × 5
A tailor has two ribbons, one 30 inches long and the other 45 inches long. She wants to cut both ribbons into pieces of the same length, without any ribbon left over.
What is the longest length she can cut the pieces?
15 inches
What is the prime factorization of 40?
2 x 2 x 2 x 5
Find the GCF of 14 and 35.
7
What are factors of 67?
1 and 67
Prime Number!
What is the prime factorization for 75?
3 x 5 x 5
You fill bags with cookies to give to your friends.
You bake 45 chocolate cookies and 30 oatmeal cookies. You want identical groups of cookies in each bag with no leftover cookies.
What is the greatest number of bags you can make?
15 bags
3 chocolate chip cookies
2 oatmeal cookies
What is the greatest common factor of 22 and 68?
2
Find the GCF of 25 and 100.
25
What are factors of 88?
1, 2, 4, 8, 11, 22, 44, 88
What is the prime factorization for 78?
2 x 3 x 13
You use 30 sandwiches and 42 granola bars to make identical picnic baskets.
You make the greatest number of picnic baskets with no food left over.
How many sandwiches and how many granola bars are in each basket?
A company has 72 chocolate bars and 90 bags of chips to create identical snack bags for an event. They want no snacks left over.
How many snack bags can they make?
How many chocolate bars and bags of chips go in each bag?
18 snack bags
4 chocolate bars
5 bags of chips