GCF & LCM & = Review

Factors

100

List all of the factors of 32.

1, 2, 4, 8, 16, and 32

1 x 32

2 x 16

4 x 8

200

List all of the common factors of 12 and 20.

1, 2, and 4

300

List all of the factors of 52.

1, 2, 4, 13, 26, and 52

400

List all of the common factors of 24 and 36.

1, 2, 3, 4, 6, 12

500

List all of the factors of 42.

1, 2, 3, 6, 7, 14, 21, 42

Multiples

100

List 3 multiples of 8 that are less than 50.

8, 16, 24, 32, 40, 48

200

List 3 common multiples of 2 and 6.

6, 12, 18, 24, 30, 36, 42, 48, etc.

300

List 4 multiples of 7 greater than 10 but less than 50.

14, 21, 28, 35, 42, 49

400

List all the common multiples of 12 and 18 that are less than 75.

36 and 72

500

List all the common multiples of 6 and 8 that are less than 50.

24 and 48

Greatest Common Factor

100

What is the greatest common factor of 12 and 15

3

200

What is the greatest common factor of 24 and 20?

4

300

What is the great common factor of 50, 35, and 15?

5

400

What is the greatest common factor of 64 and 80?

16

500

What is the greatest factor of 16 and 36?

4

Least Common Multiple

100

What is the least common multiple of 3 and 7?

21

200

What is the least common multiple of 4 and 9?

36

300

What is the least common multiple of 6 and 10?

60

400

What is the least common multiple of 8 and 12?

24

500

What is the least common multiple of 2, 3, and 5?

30

Equivalent Equations

100

What number of the following makes the equation true? 

23 + 7 = 35 - ___

5

200

What is the not equal symbol?

≠

300

Which of the following makes the equation NOT true?

7 x 5 ≠ ____ + 17

A. 9

B. 18

C. 10

D. 35

B.

400

Solve the following equation:

32 ÷ 8 = _____ - 8

12

500

Which of the following is NOT true?

A. 5 x 3 = 7 + 8 

B. 4 x 4 = 36 - 20

C. 6 x 5 = 12 + 8

D. 24 ÷ 8 = 3 + 0

C