Free Printable Exploring Prime Factors and Multiples

1.

What is the prime factorization of 36?

a)

$2^2 \times 3^2$

b)

$2 \times 3^2$

c)

$2^3 \times 3$

d)

$3^3 \times 2$

2.

Which of the following numbers is a prime number?

a)

21

b)

29

c)

33

d)

39

3.

What is $5^2$ ?

a)

10

b)

15

c)

25

d)

50

4.

Which of the following is a factor of 72?

a)

5

b)

6

c)

7

d)

11

5.

What is the prime factorization of 100?

a)

$2^2 \times 5^2$

b)

$2 \times 5^3$

c)

$2^3 \times 5$

d)

$2^2 \times 5$

6.

Which of the following numbers is NOT a multiple of 12?

a)

24

b)

36

c)

48

d)

50

7.

What is $3^4$ ?

a)

12

b)

27

c)

81

d)

64

8.

Which of the following is a common factor of 18 and 24?

a)

3

b)

5

c)

7

d)

11

9.

What is the smallest prime number?

a)

0

b)

1

c)

2

d)

3

10.

Which of the following numbers is a multiple of both 8 and 12?

a)

16

b)

24

c)

32

d)

36

11.

What is the prime factorization of 60?

a)

$2^2 \times 3 \times 5$

b)

$2 \times 3^2 \times 5$

c)

$2 \times 3 \times 5^2$

d)

$2^3 \times 5$

12.

Which of the following is NOT a factor of 45?

a)

3

b)

5

c)

7

d)

9

13.

What is $2^6$ ?

a)

12

b)

32

c)

64

d)

128

14.

Which of the following numbers is a prime number less than 20?

a)

15

b)

17

c)

18

d)

20

15.

What is the greatest common factor (GCF) of 36 and 48?

a)

6

b)

8

c)

12

d)

18

16.

Which of the following is a multiple of 9?

a)

14

b)

27

c)

32

d)

35

17.

What is the prime factorization of 84?

a)

$2^2 \times 3 \times 7$

b)

$2 \times 3^2 \times 7$

c)

$2^2 \times 7^2$

d)

$2 \times 3 \times 7$

18.

Which of the following is a factor of 100?

a)

6

b)

8

c)

10

d)

12

19.

What is $4^3$ ?

a)

12

b)

16

c)

32

d)

64

20.

Which of the following numbers is NOT a prime number?

a)

11

b)

13

c)

15

d)

17

21.

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

a)

12

b)

18

c)

24

d)

48

22.

Which of the following is a common factor of 30 and 45?

a)

2

b)

3

c)

4

d)

7

23.

What is the prime factorization of 49?

a)

$7^2$

b)

$2 \times 7$

c)

$7 \times 9$

d)

$2^2 \times 7$

24.

Which of the following numbers is a multiple of 11?

a)

22

b)

24

c)

33

d)

44

25.

What is $10^2$ ?

a)

10

b)

20

c)

50

d)

100

26.

Which of the following is NOT a factor of 64?

a)

2

b)

4

c)

8

d)

10

27.

What is the prime factorization of 90?

a)

$2 \times 3^2 \times 5$

b)

$2^2 \times 3 \times 5$

c)

$2 \times 3 \times 5^2$

d)

$3^2 \times 5$

28.

Which of the following numbers is a prime number between 50 and 60?

a)

51

b)

53

c)

55

d)

57

29.

What is the least common multiple (LCM) of 9 and 12?

a)

18

b)

24

c)

36

d)

48

30.

Which of the following is a factor of 144?

a)

9

b)

11

c)

13

d)

15

Exploring Prime Factors and Multiples

Total questions: 30

Worksheet time: 30mins

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