GCF and LCM Test

List the first 5 multiples of 20

• 1, 2, 4, 5, 10

• 1, 20, 2, 10, 4, 5

• 20, 40, 60, 80, 100

• 20, 25, 30, 35, 40

List the factors of 12.

• 1, 2, 3, 4, 6, 12

• 12, 24, 36, 48, 60...

• 1, 12, 24, 4, 6

Tags

CCSS.4.OA.B.4

What is the GCF of 30 and 18

• 3

• 2

• 6

• 9

What is the LCM of 7 and 4?

• 14

• 28

• 16

• 8

 Find the GCF of each set of numbers. 
28, 42, 56

• 14
• 4
• 7
• 8

Find the LCM of each set of numbers. 
 4, 5, 6 

• 20
• 36
• 45
• 60

Find the LCM of each set of numbers. 
5, 10, 15 

• 50
• 30
• 90
• 150

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

At the movie theater, they give out a free drink to every 75th customer and a free bag of popcorn to every 30th customer. Who is the first customer that is going to win both free items?

• 16th customer
• 150th customer
• 300th customer
• 180th customer

Henry and Margo both began traveling around a circular track. Henry is riding his bike, and Margo is walking. It takes Henry 7 minutes to make it all the way around, and Margo takes 12 minutes. How much time will pass until they meet at the starting line?

• 84 minutes
• 48 minutes
• 854 minutes
• 78 minutes