Prime and Composite
 Practice
 Topic Index | Grade 5 Math | Intermediate Test Prep | StudyZone

 

Prime numbers have exactly two factors.

Composite numbers have more than two factors.


    The number 1 has only one factor so it is
            neither prime nor composite.

Let's Try Some!

Decide whether the numbers given are prime or composite.  Click on your answer choice to check.

Remember to click on the "x" of the
pop-up box to close it.

 

Is the number prime or composite?

16


prime   composite
 
37


prime   composite
 
45


prime   composite
 
9


prime   composite
 
19


prime   composite
 

 

Let's do some more!

Which number is prime?  

9
 11
15
45
Which number is composite?  

13
 19
33
2
Which number is composite?  

4
 23
47
5
Which number is prime?  

2
 27
55
58
Which number is neither prime nor composite?  

2
 5
3
1

 

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Topic Index | Grade 5 Math | Intermediate Test Prep | StudyZone

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