Common Multiples and Factors

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

The Greatest Common Factor of two prime numbers is

• 0

• 1

• There are no common factors.

• Themselves.

Find the Greatest  Common Factor (GCF) of 14 & 22.

• 1

• 2

• 7

• 14

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 does GCF mean?

• Great Cookie Fever

• Greatest Common Factor

• Greatest Common Multiple

• Greatest Compared Factor

How do you find the multiples of a number?

• Use division to find out what you multiply to make a multiple.

• Use my multiplication facts and write them out.

• Write down how many times that number appears in a multiplication table/chart.

What are the factors of 25?

• 1, 2, 3, 5, 10, 15, 25

• 1, 5,  25

• 1, 25

• 1, 5

Find the Least Common Multiple of 9 and 6

• 18

• 36

• 38

• 72

Find the greatest common factor of 20 and 30

• 2

• 5

• 10

• 15

What is the LCM of 12 and 10

• 120

• 50

• 60