Greatest Common Factor and Least Common Multiple

Identify ALL the factors of 20

• 1, 2, 4, 5, 10, 20

• 4, 5

• 1,2, 10, 20

• 2, 4, 5, 10

Tags

CCSS.4.OA.B.4

Greatest Common factor of 15 and 25 is ___________

Which is a list of multiples of 6

• 6, 12, 18, 24, 30

• 6, 12, 18, 20

• 1, 2, 3, 6

• 6, 12, 14, 32, 1563

What is the greatest common factor of 24 and 36?

• 2

• 3

• 12

• 24

What is the Least Common Multiple of 15 and 10?

• 15

• 25

• 30

• 20

What is the Least Common Multiple of 6 and 24? 

• 3
• 6
• 12
• 24

What are the factors of 25?

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

Tags

CCSS.4.OA.B.4

A prime number is:

• A number that is made only by multiplying 1 and itself.

• An odd number.

• A popular number.

• The least common multiple of two numbers.

Tags

CCSS.4.OA.B.4

Find the greatest common factor of 20 and 30

• 2
• 5
• 10
• 15

Find the greatest common factor of 30 and 36

• 2
• 3
• 6
• 18