Number Ninja: Prime Numbers is a fast-action way to practice factors. Act quickly and use your finger or mouse to slice numbers and reduce them to their prime factors. Do not slice a prime number!

A practice quiz on the prime factorization of numbers. Includes hints.

Two different methods of finding the greatest common factor are explained at this one page website. It is very easy to follow the step by step directions.

Explore prime factors and what the missing exponent could be.

This lesson focuses on prime numbers, numbers that can only be divided by one and itself. It explains the Fundamental Theorem of Arithmetic and the Sieve of Eratosthenes. Includes practice activities.

Purplemath shows an easy and orderly way to determine the GCF and LCM of any two numbers. Even large numbers won't be a challenge with this method.

Interactive practice tests dealing with factors. Students will practice the prime factors, greatest common factor and least common multiple.

This site is an interactive quiz which provides students with a prime factorization problem. Students input their solution and have the program evaluate it. Hints are available if the student needs them, and explanations are provided...

A set of six multiple-choice questions practicing prime factorization. A help page is available for further study.

In this video, learn how to find the greatest common factor of two numbers. Then, see how this can be used to solve problems with large numbers. In the accompanying classroom activity, students learn to find prime factors using factor...

A walkthrough example of the discovery of the GCF of three numbers. Contains a definition as well.

An example (with full explanation) where a Greatest Common Factor is found.

This site provides great practice on the concept of prime factorization. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice their...

Discusses factors, prime and composite numbers, and why the number 1 is not prime or composite. Includes practice problems throughout, along with explanations of solutions.

Gain an understanding of how to factor prime numbers by viewing examples and a video lesson.

In this lesson plan, you will be learning prime factorization to solve various mathematical problems followed by solved examples and practice questions.

Prime and composite numbers are defined on this website. A prime number chart is also included for all prime numbers under 10,000.

Explore the world of Highest Common Factor or Greatest Common Factor (GCF) by going through its various aspects and properties. Find answers to questions like what is the highest common factor for a group of numbers, easy ways to...

Students can learn the definitions of "prime numbers" and "composite numbers" with this resource. Several pages are provided that show students how to break down composite numbers until only prime numbers are left.

Learn about the history of prime numbers, properties of prime numbers, and easy methods to find prime numbers. Included are solved examples and interactive problems for review.

[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to identify prime and composite numbers. Includes video demonstrating a sample problem [1:30] and a set of practice...

Identify prime numbers less than 100. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Brush up on your math skills relating to prime factorization then try some practice problems to test your understanding.

A factor of a number in math is a number that divides the given number. Factors are used in many situations in daily life. This article explains factors and how to find factors using multiplication and division. Included are solved...