Factors

media type="youtube" key="PXVxv1KUgJ8" height="344" width="425" To find the factors of a number, it is like taking the number apart. A number can be made by multiplying two or more other numbers together. The numbers that are multiplied together are called factors of the final number. For example: 12 12 = 3 x 4 Therefore, 3 and 4 are factors of 12

Another explanation from dr.math is:

Factoring is an idea you might be familiar with from multiplication. Numbers that can be multiplied together to get another number are its factors. For example, 4*3 = 12, so 3 and 4 are factors of 12. However, they're not its //only// factors; 1, 2, 6, and 12 are other factors of 12. (Another way of defining a factor is a number that goes evenly into the number you're factoring.)... Another explanation from purplemath.com is: "Factors" are the numbers you multiply to get another number. For instance, the factors of 15 are 3 and 5, because 3×5 = 15. Some numbers have more than one factorization (way of being factored). For instance, 12 can be factored as 1×12, 2×6, or 3×4. A number that can only be factored as 1 times itself is called "prime". The first few primes are 2, 3, 5, 7, 11, and 13. The number 1 is not regarded as a prime, and is usually not included in factorizations, because 1 goes in to everything. (The number 1 is a bit boring in this context, so it gets ignored.)


 * Watch** [|**this video**] **from Five Alive to learn all about factors! You must click on 'lessons' and then choose 'factors'.**

__Online Practice Activities__
[|Find a Factor] - Below the information about factors is a game. You have to find a factor of each number. The timer is on, so you should try to go as fast as you can. [|The Factor Game] - You can play against the computer or against a friend. Follow the instructions at the bottom of the game.

Factors Questions 1


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