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Primes, Factors and Multiples

Total questions: 29

Worksheet time: 2hrs 25mins

Name
Class
Date
1.

Choose one prime number.

a)

1

b)

2

c)

4

d)

6

2.
Find the prime number.
a)
10
b)
9
c)
7
d)
4
3.
Which list has only prime numbers?
a)
2, 3, 4, 5
b)
1, 5, 7, 9
c)
2, 3, 5, 7
d)
2, 4, 6, 8
4.
Name the factors of 16.
a)
1, 4, 16
b)
4
c)
1, 2, 4, 8, 16
d)
2, 4, 8
5.
Name the factors of 21.
a)
1, 3, 7, 21
b)
3, 7
c)
1, 21
d)
1, 2, 7, 21
6.
Name the factors of 42.
a)
1, 6, 7, 42
b)
1, 2, 3, 6, 7, 14, 21, 42
c)
1, 2, 6, 7, 21, 42
7.

A prime number is...

a)

a number that has only two factors.

(1 and itself)

b)

a number that has at least two factors.

c)

a number that has more than two factors.

d)

a number that has only one factor.

8.
Which number is NOT prime?
a)
3
b)
7
c)
17
d)
21
9.
What is the prime factorization of 15?
a)
3x3x3
b)
2x2x5
c)
15
d)
3x5
10.
Composite numbers:
a)
Are always bigger than prime numbers
b)
Have more than 2 factors
c)
Have 2 pairs of factors
d)
Don't have factors
11.
Draw a factor tree for 24 on your white board. What is the correct prime factorization?
a)
2 x 2 x 2 x 3
b)
2 x 2 x 3
c)
6 x 4 
12.

List all the factors of 29.

a)

29 does not have any factors.

b)

1, 29

c)

29

13.

What are the prime factors of 27?

a)

3x3x3

b)

3x2x3

c)

3x3x4

14.

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

15.
Is 12 prime or composite?
a)
prime
b)
composite
16.
is 5 prime or composite?
a)
prime
b)
composite
17.

Which one is a multiple of 4?

a)

33

b)

22

c)

24

18.

Which number is a multiple of 3?

a)

27

b)

28

c)

29

19.

What is the missing factor?

a)

1

b)

2

c)

5

d)

8

20.

What is the missing factor?

a)

3

b)

5

c)

6

d)

7

21.
Which number is NOT a factor of 10?
a)
1
b)
2
c)
3
d)
5
22.

This is an example of...

a)

the ladder method

b)

factor trees

c)

composite factorization

23.

Find the list of the first 5 multiples of 3.

a)

3, 6, 12, 24, 48

b)

3, 9, 27, 81, 243

c)

3, 4, 5, 6, 7

d)

3, 6, 9, 12, 15

24.
Numbers that can be multiplied together to make a product.
a)
multiples
b)
sum
c)
factors
d)
facts
25.

TRUE or FALSE?


A FACTOR is greater than the number you are factoring

a)

TRUE

b)

FALSE

26.

TRUE or FALSE?

A MULTIPLE is greater than the number you are multiplying

a)

True

b)

False

27.
14, 49, and 28 are all multiples of what number?
a)
2
b)
7
c)
4
d)
5
28.
Joe has listed the first 4 multiples of 7 as: 
7   14    22     28
Which one is incorrect?
a)
7
b)
14
c)
22
d)
28
29.

List the first (4) multiples of 8

a)

1, 2, 4, 8

b)

8, 16, 24, 32

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