Write If a Number is a Prime or Composite: Worksheets, Online Test and Calculators

Write if a number is a prime or composite worksheets, solved worksheet problems or exercises with step-by-step work, formative assessment as online test, calculator and more learning resources to learn, practice, assess and master the basic math skills of divisors and factors.

Write If a Number is a Prime or Composite

Name Grade School
Date Questions20 Score

1
is 33 a prime number?
2
is 21 a composite number?
3
is 39 a composite number?
4
is 25 a prime number?
5
is 21 a prime number?
6
is 19 a composite number?
7
is 111 a prime number?
8
is 157 a prime number?
9
is 119 a composite number?
10
is 23 a prime number?
11
is 27 a composite number?
12
is 143 a prime number?
13
is 343 a prime number?
14
is 37 a prime number?
15
is 3025 a prime number?
16
is 59 a composite number?
17
is 513 a composite number?
18
is 2 a composite number?
19
is 67 a composite number?
20
is 65 a composite number?

Solved Worksheet Problems
1
is 33 a prime number?
No, 33 is not a prime number as it has more than 2 factors.
1, 3, 11 and 33 are the factors of 33
2
is 21 a composite number?
Yes, 21 is a composite number as it has more than 2 factors.
1, 3, 7 and 21 are the factors of 21
3
is 39 a composite number?
Yes, 39 is a composite number as it has more than 2 factors.
1, 3, 13 and 39 are the factors of 39
4
is 25 a prime number?
No, 25 is not a prime number as it has more than 2 factors.
1, 5 and 25 are the factors of 25
5
is 21 a prime number?
No, 21 is not a prime number as it has more than 2 factors.
1, 3, 7 and 21 are the factors of 21
6
is 19 a composite number?
No, 19 is not a composite number as it has only 2 factors.
Factors of 19 = 1 and 19
7
is 111 a prime number?
No, 111 is not a prime number as it has more than 2 factors.
1, 3, 37 and 111 are the factors of 111
8
is 157 a prime number?
Yes, 157 is the prime number as it can be divisible by 1 and itself.
Factors of 157 = 1 and 157
9
is 119 a composite number?
Yes, 119 is a composite number as it has more than 2 factors.
1, 7, 17 and 119 are the factors of 119
10
is 23 a prime number?
Yes, 23 is the prime number as it can be divisible by 1 and itself.
Factors of 23 = 1 and 23
11
is 27 a composite number?
Yes, 27 is a composite number as it has more than 2 factors.
1, 3, 9 and 27 are the factors of 27
12
is 143 a prime number?
No, 143 is not a prime number as it has more than 2 factors.
1, 11, 13 and 143 are the factors of 143
13
is 343 a prime number?
No, 343 is not a prime number as it has more than 2 factors.
1, 7, 49 and 343 are the factors of 343
14
is 37 a prime number?
Yes, 37 is the prime number as it can be divisible by 1 and itself.
Factors of 37 = 1 and 37
15
is 3025 a prime number?
No, 3025 is not a prime number as it has more than 2 factors.
1, 5, 11, 25, 55, 121, 275, 605 and 3025 are the factors of 3025
16
is 59 a composite number?
No, 59 is not a composite number as it has only 2 factors.
Factors of 59 = 1 and 59
17
is 513 a composite number?
Yes, 513 is a composite number as it has more than 2 factors.
1, 3, 9, 19, 27, 57, 171 and 513 are the factors of 513
18
is 2 a composite number?
No, 2 is not a composite number as it has only 2 factors.
Factors of 2 = 1 and 2
19
is 67 a composite number?
No, 67 is not a composite number as it has only 2 factors.
Factors of 67 = 1 and 67
20
is 65 a composite number?
Yes, 65 is a composite number as it has more than 2 factors.
1, 5, 13 and 65 are the factors of 65

Worksheet: Write If a Number is a Prime or Composite

Write if a number is a prime or composite worksheet is the largest collection of practice problems and solved exercises which can be served as homework, classwork or assignment problems for the students to learn, practice, assess, iterate and master the skills of how to solve such divisors and factors problems in basic mathematics.

Online Test
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Is 279 prime or composite number?
Is 2 prime or composite number?
Is 1 prime or composite number?
Is 338 prime or composite number?
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Online Test: Write If a Number is a Prime or Composite

This online test to find the write if a number is a prime or composite is a formative assessment which can be used as homework, classwork or assignment problems to assess and improve the learner's math skills on divisors and factors.