Practice Composite Numbers in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
Integers greater than 1 that can be expressed as a product of two smaller positive integers; they are the opposite of primes.
Numbers that can be built by multiplying smaller numbers together.
Showing a random 20 of 50 problems.
Example 1
mediumList all composite numbers between and , with one factor pair each.
Example 2
easyDetermine whether is prime or composite. If composite, find a factor pair.
Example 3
easyIs composite? If yes, give a factor pair other than .
Example 4
challengeFor , prove that is composite for every integer .
Example 5
mediumWhich composite numbers in are odd?
Example 6
easyIs prime, composite, or neither?
Example 7
easyTrue or false: every even number greater than is composite.
Example 8
easyIs composite? Is composite? Is composite? Explain each briefly.
Example 9
hardDetermine whether is prime or composite.
Example 10
easyIs composite?
Example 11
easyIs a composite number?
Example 12
mediumIs prime or composite? Justify with a factorization if composite.
Example 13
mediumList all composite numbers between and .
Example 14
challengeProve that the product of two consecutive integers greater than is composite.
Example 15
easyIs prime or composite? Show a factorization if composite.
Example 16
mediumTrue or false: is composite.
Example 17
mediumList all composite numbers between and , and for each, give one non-trivial factor pair.
Example 18
easyName the smallest composite number.
Example 19
mediumIs prime or composite? Test divisibility.
Example 20
easyGive two different composite numbers between and .