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## Prime Numbers - Sample Math Practice Problems

The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance. Answers to these sample questions appear at the bottom of the page. This page does not grade your responses.

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### Complexity=5

Indicate whether or not the number displayed is a prime number.

 1.   5 is is not a prime number. 2.   3 is is not a prime number.

### Complexity=10

Indicate whether or not the number displayed is a prime number.

 1.   10 is is not a prime number. 2.   4 is is not a prime number.

### Complexity=15

Indicate whether or not the number displayed is a prime number.

 1.   1 is is not a prime number. 2.   11 is is not a prime number.

### Complexity=20

Indicate whether or not the number displayed is a prime number.

 1.   14 is is not a prime number. 2.   8 is is not a prime number.

### Complexity=25

Indicate whether or not the number displayed is a prime number.

 1.   22 is is not a prime number. 2.   1 is is not a prime number.

### Complexity=30

Indicate whether or not the number displayed is a prime number.

 1.   23 is is not a prime number. 2.   12 is is not a prime number.

### Complexity=50

Indicate whether or not the number displayed is a prime number.

 1.   18 is is not a prime number. 2.   15 is is not a prime number.

## Answers

### Complexity=5

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
15 a prime number.
#Correct AnswerYour Answer
23 a prime number.

### Complexity=10

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
110 a prime number.
#Correct AnswerYour Answer
24 a prime number.

### Complexity=15

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
11 a prime number.
#Correct AnswerYour Answer
211 a prime number.

### Complexity=20

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
114 a prime number.
#Correct AnswerYour Answer
28 a prime number.

### Complexity=25

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
122 a prime number.
#Correct AnswerYour Answer
21 a prime number.

### Complexity=30

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
123 a prime number.
#Correct AnswerYour Answer
212 a prime number.

### Complexity=50

Indicate whether or not the number displayed is a prime number.

#Correct AnswerYour Answer
118 a prime number.
#Correct AnswerYour Answer
215 a prime number.
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