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Worksheets

Factors

Total questions: 21

Worksheet time: 5hrs 15mins

Name
Class
Date
1.
A prime number...
a)
has one factor.
b)
has more than 2 factors.
c)
has 100 factors.
d)
has exactly 2 factors: 1 and the itself.
2.
A composite number ...
a)
has more than 2 factors.
b)
has one factor.
c)
has at least 10 factors.
d)
is always a really big number.
3.
Find the prime number.
a)
10
b)
9
c)
7
d)
4
4.
which number below is NOT prime?
a)
7
b)
9
c)
2
d)
3
5.
Is 12 prime or composite?
a)
prime
b)
composite
6.

Which is the prime factorization of 12?

a)

2 x 2 x 3

b)

2 + 2 + 2 + 2 + 2 + 2

7.
Which are the factors of 14?
a)

(1,14)

b)

(1, 2, 7, 14)

c)

(2, 7)

8.
Which are the factors of 24?
a)

(1, 2, 3, 8, 12, 24)

b)

(2, 3, 4, 6, 8, 12)

c)

(1, 2, 3, 4, 6, 8, 12, 24)

9.

What are the prime factors of 27?

a)

3x3x3

b)

3x2x3

c)

3x3x4

10.

Use a number tree to find the prime factorization of 32

a)

2 x 2 x 2 x 3

b)

2 x 2 x 2 x 2 x 2

11.

Find the prime factors of 45.

a)

5x9

b)

3x15

c)

3x3x5

12.
is 5 prime or composite?
a)
prime
b)
composite
13.

Which number is a multiple of 3?

a)

27

b)

28

c)

29

14.

Which one is a multiple of 4?

a)

33

b)

22

c)

24

15.

Which of the following shows the multiples of 12?

a)

12,22,53,60

b)

4,8,12,16,24

c)

12,24,36,48,60

16.

Select all of the multiples of 8.

a)

2

b)

8

c)

32

d)

4

17.

Select all of the composite numbers.

a)

12

b)

16

c)

3

d)

7

18.

Which of the following is a factor of 12? Select all that apply.

a)

12

b)

2

c)

24

d)

3

19.

Which one of the numbers below is prime numbers?

a)

15

b)

17

c)

16

d)

12

20.

What is the greatest common factor of 14 and 35?

a)

2

b)

7

c)

8

d)

5

21.

What is the greatest common factor of 35 and 47?

a)

5

b)

7

c)

1

d)

8