Exploring Factors and Multiples: GCF and LCM

Which of the following is NOT a factor of 12?

• 6

• 5

• 3

• 2

What are the factors of 18?

• 1, 3, 6, 9, 18

• 1, 2, 3, 6, 12, 18

• 1, 2, 4, 6, 9, 18

• 1, 2, 3, 6, 9, 18

Which of the following pairs are factors of 12?

• 4 and 8

• 3 and 5

• 2 and 6

• 1 and 11

What is the greatest common factor (GCF) of 12 and 18?

• 12

• 6

• 3

• 1

What is a common factor of 12 and 18?

• 4

• 5

• 6

• 7

What is the least common multiple (LCM) of 6 and 15?

• 45

• 30

• 60

• 15

Which of the following is a multiple of 6?

• 16

• 14

• 12

• 10

What is the first multiple of 15?

• 60

• 15

• 30

• 45

Which of the following is NOT a multiple of 6?

• 30

• 35

• 18

• 24

What is the next common multiple of 6 and 15 after 30?

• 55

• 50

• 45

• 60