Which of the following best describes the number 13?

It is neither prime nor composite.

It is both prime and composite.

Prime and Composite Numbers Practice — Grade 4 math

1. Which of the following best describes the number 13?
- A. It is a prime number.
- B. It is a composite number.
- C. It is neither prime nor composite.
- D. It is both prime and composite.
2. A composite number is a whole number with more than two factors. The number 9 is composite. How many factors does it have? ___
3. According to the definitions of prime and composite numbers, how is the whole number 1 classified?
- A. Prime
- B. Composite
- C. Neither prime nor composite
- D. Both prime and composite
4. Which of the following numbers is a composite number?
- A. 2
- B. 7
- C. 15
- D. 17
5. A prime number is a whole number greater than 1 that has exactly how many factors? ___
6. Which of the following numbers is a prime number?
- A. 9
- B. 13
- C. 15
- D. 21
7. A whole number is considered composite if it has more than ___ factors.
8. How is the number 1 classified in mathematics?
- A. Prime
- B. Composite
- C. Both prime and composite
- D. Neither prime nor composite
9. The number 19 is a prime number because it has exactly ___ factors.
10. Which of these numbers is a composite number?
- A. 2
- B. 7
- C. 11
- D. 12