Examples of prime and composite numbers with solved solutions

📚 Quick Study Guide

• 🔢 A prime number is a whole number greater than 1 that has only two divisors: 1 and itself. Examples: 2, 3, 5, 7, 11, 13, etc.
• ➗ A composite number is a whole number greater than 1 that has more than two divisors. Examples: 4, 6, 8, 9, 10, 12, etc.
• 💡 The number 1 is neither prime nor composite.
• ➮ To determine if a number is prime or composite, check for divisors other than 1 and itself.
• ➕ Every composite number can be expressed as a product of prime numbers (prime factorization).

📝 Practice Quiz

1. What is the smallest prime number?
   1. 0
   2. 1
   3. 2
   4. 3
2. Which of the following is a composite number?
   1. 7
   2. 11
   3. 13
   4. 15
3. Which of the following numbers is a prime number?
   1. 1
   2. 9
   3. 16
   4. 17
4. What are the factors of the composite number 12?
   1. 1, 2, 3, 4, 6, 12
   2. 1, 3, 4, 12
   3. 1, 2, 6, 12
   4. 2, 3, 4, 6
5. Which of the following is a prime factorization of 20?
   1. 2 x 2 x 5
   2. 2 x 10
   3. 4 x 5
   4. 2 x 2 x 2 x 2
6. Which of the following numbers is neither prime nor composite?
   1. 0
   2. 1
   3. 2
   4. 4
7. What is the next prime number after 7?
   1. 8
   2. 9
   3. 10
   4. 11