6

2

8

4

2. What is the Least Common Multiple of 9 and 12?

108

24

3

36

3. Which of these is neither composite nor prime?

55

62

1

3

4. Which one of the following lists has only composite numbers?

3,11,13,15,23

9,15,21

3,5,7,11,13,17,19,23

5,17,19,21

5. What is the prime factorization of 75?

5³

15³

3² x 5

3 x 5²

6. Which of these is neither composite nor prime?

297

0

76

8

7. What is the prime factorization of 100?

2 x 50

2 x 2 x 5 x 5

2 x 2 x 25

5 x 2 x 10

8. Which number is the least common multiple (LCM) for 6 and 7?

84

42

14

12

9. Which of the following describes a composite number?

A composite number has no factors.

A composite number has an infinite number of factors.

A composite number has three or more factors.

A composite number has exactly two factors.

10. Which of the answers below is a prime factorization of the number 70?

5x14

2x35

2x5x7

10x7

11. 2² x 11 is the prime factorization for which number?

94

22

44

64

12. What is the greatest common factor (GCF) for 16 and 32?

4

8

16

64

13. Which of the following describes a prime number?

A prime number has no factors.

A prime number has three or more factors.

A prime number has exactly two factors.

A prime number has an infinite number of factors.

14. Which of the following is not a composite number?

45

43

44

42

15. Which of these is prime?

63

0

1

17

16.

57 ÷ 1,995

57 x 1,995

1,995 ÷ 57

1,995 - 57

17. Use the model to answer the question. Which equation does the shaded model represent?

0.3 x 0.4 = 0.12

0.3 x 0.4 = 12

0.3 x 0.4 = 0.7

0.3 x 0.4 = 1.2

18. Which model shows 100 divided by 20?

a.

b.

c.

d.

19.

a.

b.

c.

d.

20.

0.4 x 0.7 = 0.028

0.4 x 0.7 = 2.8

0.4 x 0.7 = 28

0.4 x 0.7 = 0.28