I really don't understand this question and I can't seem to be able to solve it. Can anyone help me?
Write a composite number between 7 and 20.
Here's an excellent explanation of composite numbers.
http://www.mathsisfun.com/definitions/composite-number.html
Two composite numbers are 9 and 10. What other composite numbers can you find?
Thank you the site was very helpful.
You're welcome.
Of course! I can help you with that. First, let's define what a composite number is. A composite number is a positive integer that has at least one factor other than 1 and itself. In simpler terms, a composite number is any number greater than 1 that is not prime.
To find a composite number between 7 and 20, we need to check if any numbers in this range have factors other than 1 and themselves.
Let's go through the numbers in this range one by one:
- 7: Since 7 is a prime number, it does not have any factors other than 1 and itself.
- 8: To check if 8 is composite, we need to find factors other than 1 and itself. The factors of 8 are 1, 2, 4, and 8. Since 8 has factors other than 1 and itself, it is a composite number.
- 9: The factors of 9 are 1, 3, and 9. Since 9 has factors other than 1 and itself, it is a composite number.
- 10: The factors of 10 are 1, 2, 5, and 10. Since 10 has factors other than 1 and itself, it is a composite number.
- 11: Since 11 is a prime number, it does not have any factors other than 1 and itself.
- 12: The factors of 12 are 1, 2, 3, 4, 6, and 12. Since 12 has factors other than 1 and itself, it is a composite number.
- 13: Since 13 is a prime number, it does not have any factors other than 1 and itself.
- 14: The factors of 14 are 1, 2, 7, and 14. Since 14 has factors other than 1 and itself, it is a composite number.
- 15: The factors of 15 are 1, 3, 5, and 15. Since 15 has factors other than 1 and itself, it is a composite number.
- 16: The factors of 16 are 1, 2, 4, 8, and 16. Since 16 has factors other than 1 and itself, it is a composite number.
- 17: Since 17 is a prime number, it does not have any factors other than 1 and itself.
- 18: The factors of 18 are 1, 2, 3, 6, 9, and 18. Since 18 has factors other than 1 and itself, it is a composite number.
- 19: Since 19 is a prime number, it does not have any factors other than 1 and itself.
- 20: The factors of 20 are 1, 2, 4, 5, 10, and 20. Since 20 has factors other than 1 and itself, it is a composite number.
Based on our analysis, we can see that the composite numbers between 7 and 20 are 8, 9, 10, 12, 14, 15, 16, 18, and 20.
Therefore, you can choose any of these numbers as your answer to the question.