GCF

MATHEMATICS 4

by Camille Rosario

Multiple Choice

Determine GCF of 10 and 16

• 1

• 3

• 2

• 4

Multiple Choice

Determine GCF of 15 and 18

• 3

• 2

• 5

• 6

Listing Method

• 16 = 1, 2, 4, 8, 16

• 24 = 1, 2, 3, 4, 6, 8, 12, 24

• If we will compare the list of factors of 16 and 24, we can identify the common factors.

• GCF is the highest common factor that appears on the list.

• The GCF of 16 and 24 is 8.

Example 1

Draw

What is the GCF of 18 and 24

GCF

Greatest Common Factor

Multiple Choice

Determine GCF of 24 and 36

• 3

• 6

• 2

• 420 and 1

Multiple Choice

Determine GCF of 20 and 32

• 2 and 160

• 2

• 3

• 4

Multiple Choice

What is the GCF of 9 and 18?

• 3

• 6

• 9

• 18

Multiple Choice

Determine GCF of 45 and 50

• 1

• 2

• 5

• 3

Multiple Select

All are common factors of 15 and 60 except from?

• 2

• 3

• 5

• 6

• 15