LCM and GCF

GCF of: 
14 and 20

• 7

• 28

• 2

• 6

LCM of: 
5 and 8

• 20

• 40

• 5

• 8

Which of these is a factor of 10?

• 2

• 4

• 20

Which is not a factor of 12?

• 3

• 6

• 24

Which of the following is not a multiple of 9?

• 9

• 19

• 90

Using a Factor Tree, find the prime factorization of 48 in expanded form. 

• 2 x 12 x 12

• 2 x 2 x 2 x 2 x 3 x 3 x 5

• 2 x 2 x 2 x 2 x 3

• 7 x 7 x 7 

What is the least common multiple (LCM) of 4 and 10?

• 4

• 40

• 15

• 20

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

Lisa is making activity baskets to donate to charity.  She has 12 coloring books and 36 crayons.  What is the greatest number of baskets she can make if each type of toy is equally distributed among the baskets?

• 2

• 12

• 36

• 6

Peter has 18 oranges and 27 pears.  He wants to make fruit baskets with the same number of each fruit in each basket.  What is the greatest number of baskets he can make? 

• 3

• 18

• 9

• 27