How To: Prime & Composite Numbers & Factors

Here, you will learn all you need to know about prime and composite numbers.

What Is a Prime Number?

A prime number is a number that is great than 1and can only be divided by one and itself.

Examples of prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and much more...

Is 6 a prime number?

No, because 6 can be divided evenly by 2 and 3, and also 1 and 6.

Is 13 a prime number?

Yes, because 13 can only be divided evenly by 1 and 13, which is itself.

What Is a Composite Number?

A composite number is a number that can be divided evenly by 1, itself, and other numbers.

Examples of composite numbers: 4, 6, 8, 9, 12, 14, 15, 16, 18, 20, 21 and much more.

Is 15 a composite number?

Yes, because 15 can be divided evenly by 3 and 5, and also 1 and itself.

Is 29 a composite number?

No, because 29 can only be divided evenly by 1 and 29, which is itself.

Factors

Factors are numbers that when multiplied together, equal a number.

What are factors of 14?

Factors of 14 are 1,2, and 7.

What are factors of 23?

Factors of 23 are 1 and 23.

Practice Time

If you want to practice, answer the questions 1 through 4. Below the questions are the answers.

1. Is 15 a composite number or a prime number? Why?
1. Is 29 a prime number of composite number? Why?
1. What are factors of 27?
1. What are factors of 13?

1. 15 is a composite number because it can be divided evenly by 1, 3, and 5.
1. 29 is a prime number because it can only be divided evenly by 1 and 29.
1. Factors of 27 are 1, 3, 9, and 27.
1. Factors of 13 are 1 and 13.

For more fun practice, just play this game! Click the link to play : http://www.sheppardsoftware.com/mathgames/numbers/fruit_shoot_prime.htm

Citations

Just updated your iPhone? You'll find new features for TV, Messages, News, and Shortcuts, as well as important bug fixes and security patches. Find out what's new and changed on your iPhone with the iOS 17.6 update.

• Hot
• Latest