4B Unit 14 Prime Numbers and Composite Numbers Quiz

1. Which of the following are the prime numbers within 10? (There can be more than 1 answer.)

• 1
• 3
• 5
• 8

2. For numbers up to 30, the greatest prime number is ____.

3. For numbers up to 61, the greatest composite number is ____.

4. Which of the following is a composite number within 20?

• 2
• 7
• 18
• 19

5. Which of the following is a prime number within 40?

• 14
• 22
• 37
• 39

6. Which of the following are composite numbers? (There can be more than 1 answer.)

• 12
• 19
• 23
• 30

7. Which of the following number is the smallest prime number among them?

• 12
• 13
• 15
• 17

8. The greatest 2-digit composite number is ____.

9. The greatest 2-digit prime number is ____.

10. Which of the followings is a prime number within 100?

• 73
• 74
• 98
• 99