### 4 videos in "Prime Factors"

## Factors and Prime Numbers

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

(
download video
)

Defines factors and prime numbers, and how to determine if a number is prime or not.

- What are Prime Numbers - Gives you more information on What are Prime Numbers? types,properties and list of prime numbers.

- What is a factor?
- What are the prime factors of 42?
- What are some factors of 24?
- How do you find all the factors of 15?
- What are divisibility tests?
- How do you know if 2, 3, or 5 go into a number?
- What is a prime number?
- How do you know if a number is a prime number?
- Which numbers between 2 and 105 are prime?

This lesson is a very basic introduction to factors. It starts out with a definition of what a factor is, how to find the factors of a number, and a review of divisibility tests for some numbers. Several examples of finding factors are shown. Also, prime numbers and prime factors are explained, and you will see which numbers between 2 and 105 are prime.