Understanding Factors and Multiples

What is the greatest common factor (GCF) of 24 and 36?

• 6

• 8

• 12

• 18

What is the greatest common factor (GCF) of 18, 24, and 30?

• 2

• 3

• 6

• 12

What is the least common multiple (LCM) of 4 and 5?

• 9

• 10

• 15

• 20

What is the prime factorization of 60?

What are the factor pairs of 28?

• (1, 28), (2, 14), (4, 7)

• (1, 28), (2, 12), (4, 8)

• (1, 28), (3, 9), (4, 7)

• (1, 28), (2, 14), (3, 9)

What is the greatest common factor (GCF) of 45 and 75?

• 5

• 10

• 15

• 25

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

• 12

• 18

• 24

• 48