The number 30 is a composite number.
A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself. In contrast, a composite number has more than two distinct positive divisors.
For the number 30, we can see that it can be divided evenly by 1, 2, 3, 5, 6, 10, 15, and 30. Since there are divisors other than 1 and 30 itself, this confirms that 30 is composite. Additionally, the prime factorization of 30 is 2 × 3 × 5, which further indicates that it has multiple factors. Therefore, we conclude that 30 is definitely a composite number.