Name: 
 

Prime and Composite Numbers, Quiz


Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
A = {2, 3, 5, 7, 11, 19, 23, 29}
Which of the following is a true statement concerning A?
A
All numbers in A are prime.
B
All numbers in A are composites.
C
All numbers in A are even.
D
All numbers in A are odd.
 

 2. 
Look at the set shown below.
{2a, 3a, 4a}
If a is a prime number, how many members of the set are also prime?
A
3
B
0
C
2
D
1
 

 3. 
Which of these is a prime number?
A
69
C
37
B
38
D
74
 

 4. 
Which of these is a prime number?
A
38
C
20
B
51
D
19
 

 5. 
Which of these is a prime number?
A
34
C
17
B
6
D
18
 

 6. 
Which of these is a composite number?
A
7
C
14
B
23
D
29
 

 7. 
Which of these is a composite number?
A
3
C
7
B
17
D
34
 

 8. 
Which of these is a composite number?
A
19
C
38
B
7
D
13
 

 9. 
What numbers complete this factor tree?
mc009-1.jpg
A
3, 4, and 7
C
2, 3, and 7
B
2, 4, and 7
D
3, 4, and 6
 

 10. 
What numbers complete this factor tree?
mc010-1.jpg
A
2 x 5 x 5
C
2 x 2 x 5
B
2 x 25
D
5 x 5 x 5
 



 
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