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Grade 4 Math · Prime and Composite Numbers

Grade 4 Prime and Composite Numbers Practice Test

Build Grade 4 Math skills with five 10-question practice tests on prime and composite numbers, factor trees, prime factorization, divisibility, and factor pairs.

Prime and Composite Numbers Practice Tests

These Grade 4 Math practice tests help students classify whole numbers by their factors. Students identify prime and composite numbers, build factor trees, write prime factorizations, use divisibility rules, and apply factor reasoning to equal groups and schedules.

Skills covered

  • Identifying prime and composite numbers
  • Understanding why 1 is neither prime nor composite
  • Listing factors and factor pairs
  • Building factor trees and prime factorizations
  • Using divisibility rules to test factors
  • Applying prime and composite reasoning to word problems

How to use these practice tests

List factor pairs to classify a number. A prime number has exactly two positive factors: 1 and itself. A composite number has more than two positive factors. Remember that 1 has only one positive factor, so it is neither prime nor composite.

For more Grade 4 Math practice, return to the Grade 4 Math category.

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5 Tests
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5. Test

Grade 4 Prime and Composite Numbers Practice Tests

A 10-question Grade 4 Math practice test on prime and composite numbers, factor trees, prime factorization, divisibility, and factor pairs.

List factor pairs, test divisibility, and decide whether a number has exactly two factors, more than two factors, or only one factor.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

Why is 11 neither prime nor composite?

Please select an answer first.

Correct answer: A

The correct answer is It has exactly one positive factor..

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: Prime numbers have exactly two factors and composite numbers have more than two; 1 has only one.
  3. Check the choice: The correct choice is It has exactly one positive factor..

Prime numbers have exactly two factors and composite numbers have more than two; 1 has only one.

2. QuestionMultiple choice

What number makes □×7=35□ × 7 = 35?

Please select an answer first.

Correct answer: B

The correct answer is 55.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: 5×7=355 × 7 = 35, so the missing factor is 5.
  3. Check the choice: The correct choice is 55.

5×7=355 × 7 = 35, so the missing factor is 5.

3. QuestionMultiple choice

Which number has the factor pairs 1×241 × 24 and 3×83 × 8?

Please select an answer first.

Correct answer: C

The correct answer is 2424.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: Both factor pairs multiply to 24.
  3. Check the choice: The correct choice is 2424.

Both factor pairs multiply to 24.

4. QuestionMultiple choice

Which is a prime factor of 4242?

Please select an answer first.

Correct answer: D

The correct answer is 77.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: 42=2×3×742 = 2 × 3 × 7; 7 is a prime factor.
  3. Check the choice: The correct choice is 77.

42=2×3×742 = 2 × 3 × 7; 7 is a prime factor.

5. QuestionMultiple choice

Which number is divisible by 22, 33, and 55?

Please select an answer first.

Correct answer: A

The correct answer is 3030.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: 30 is even, its digits add to 3, and it ends in 0.
  3. Check the choice: The correct choice is 3030.

30 is even, its digits add to 3, and it ends in 0.

6. QuestionMultiple choice

What is the least common multiple of 44 and 66?

Please select an answer first.

Correct answer: B

The correct answer is 1212.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: The first shared positive multiple is 12.
  3. Check the choice: The correct choice is 1212.

The first shared positive multiple is 12.

7. QuestionMultiple choice

Which statement is true about 3737?

Please select an answer first.

Correct answer: C

The correct answer is It is prime..

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: 37 has only 1 and 37 as positive factors, so it is prime.
  3. Check the choice: The correct choice is It is prime..

37 has only 1 and 37 as positive factors, so it is prime.

8. QuestionMultiple choice

Which number is composite even though it is odd?

Please select an answer first.

Correct answer: D

The correct answer is 4545.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: 45 is odd but has factors such as 3, 5, 9, and 15, so it is composite.
  3. Check the choice: The correct choice is 4545.

45 is odd but has factors such as 3, 5, 9, and 15, so it is composite.

9. QuestionMultiple choice

A number has a factor pair 6×96 × 9. What number is it?

Please select an answer first.

Correct answer: A

The correct answer is 5454.

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: 6×9=546 × 9 = 54, so the number is 54.
  3. Check the choice: The correct choice is 5454.

6×9=546 × 9 = 54, so the number is 54.

10. QuestionMultiple choice

Which strategy is best for deciding whether a number is prime?

Please select an answer first.

Correct answer: B

The correct answer is Test whether any whole number besides 1 and itself divides it evenly..

  1. Check the factors: List factor pairs or test divisibility to classify the number.
  2. Classify the number: A prime number has no divisors other than 1 and itself, so factor testing is appropriate.
  3. Check the choice: The correct choice is Test whether any whole number besides 1 and itself divides it evenly..

A prime number has no divisors other than 1 and itself, so factor testing is appropriate.

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Frequently asked questions about Grade 4 Prime and Composite Numbers

What is a prime number?

A prime number is a whole number greater than 1 with exactly two positive factors: 1 and the number itself.

What is a composite number?

A composite number is a whole number greater than 1 with more than two positive factors.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 4 Prime and Composite Numbers questions in total.