lcm and gcf

What is the least common multiple (LCM) of 5 and 20?

• 4
• 5
• 20
• 100

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

• 4
• 40
• 15
• 20

What is the least common multiple (LCM) of 6 and 8?

• 6
• 8
• 48
• 24

GCF of 12 and 18

• 3
• 4
• 6
• 2

List all the factors of 12

• 1, 2, 3, 4, 6, 12
• 1, 2, 4, 12
• 1, 12
• 1, 2, 3, 4, 5, 6, 12

What are the factors of 25?

• 1, 2, 3, 5, 10, 15, 25
• 1, 5,  25
• 1, 25
• 1, 5

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

What is the least common multiple (LCM) of 4 and 9?

• 12
• 36
• 27
• 9

 Find the GCF of each set of numbers. 
50, 40

• 5
• 2
• 10
• 8

 Find the GCF of each set of numbers. 
12, 30 

• 4
• 2
• 5
• 6