Grade 4 Math · Prime and Composite Numbers
Build Grade 4 Math skills with five 10-question practice tests on prime and composite numbers, factor trees, prime factorization, divisibility, and factor pairs.
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.
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.
4. Test
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.
Please select an answer first.
Correct answer: A
The correct answer is 1 row of 17 or 17 rows of 1.
17 is prime, so its only factor pair is .
Please select an answer first.
Correct answer: B
The correct answer is 6 groups of 4.
, so 6 groups of 4 use all the cards.
Please select an answer first.
Correct answer: C
The correct answer is .
The least common multiple of 3 and 5 is 15.
Please select an answer first.
Correct answer: D
The correct answer is Only 1 group of 31 or 31 groups of 1 are possible..
31 is prime, so its only positive factor pair is .
Please select an answer first.
Correct answer: A
The correct answer is .
The factors are 1, 2, 4, 8, and 16, so there are 5.
Please select an answer first.
Correct answer: B
The correct answer is .
Breaking 48 into prime factors gives .
Please select an answer first.
Correct answer: C
The correct answer is .
2, 3, and 5 each have exactly two positive factors.
Please select an answer first.
Correct answer: D
The correct answer is .
4, 6, and 9 each have more than two positive factors.
Please select an answer first.
Correct answer: A
The correct answer is .
, so 9 equal teams are possible.
Please select an answer first.
Correct answer: B
The correct answer is .
33 has factors 1, 3, 11, and 33, so the product is composite.
A prime number is a whole number greater than 1 with exactly two positive factors: 1 and the number itself.
A composite number is a whole number greater than 1 with more than two positive factors.
The page includes five mini tests with 10 questions each, for 50 Grade 4 Prime and Composite Numbers questions in total.
