Prime Factors of a Number - YourTeacher.com

For a complete lesson on prime factors, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that a factor of a number divides into the number without a remainder. For example, 7 is a factor of 14, because 7 divides into 14 without a remainder. To find the factors of a number, such as 8, first divide 8 by 1, which equals 8. Since there is no remainder, both 1 and 8 are factors of 8. Next, divide 8 by 2, which equals 4. Since there is no remainder, both 2 and 4 are factors of 8. Next, divide 8 by 3. Since 8 is not divisible by 3, then 3 is not a factor of 8. Next, divide 8 by 4, which equals 2. Since there is no remainder, both 4 and 2 are factors of 8. Notice, however, that 4 and 2 are repeat factors (we already know that 4 and 2 are factors of 8). This means that all other factors will also be repeat factors, so there is no need to continue -- the factors of 8 are 1, 2, 4, and 8. Note that a number that has more than two factors, such as 8, is called a composite number, and a number that has only two factors (itself and 1), such as 5, is called a prime number.

Category:

Education

Tags:

• prime
• factor
• factors
• composite
• math

[infernodood3]

ROFL AT 2:40 HER FACE

[lilrain3000]

Some people on You tube are so childish... grow up! she dedicated her time to make this video at least give her some dignity, Shit....

[cull1996]

@infernodood3 More Like 2:19 !!! LOL

[MoMoMarceline]

why dont they divide equally?

[booth2710]

I think she's great. Far better then most of my maths teacher. I had a maths teacher who used to hit us on the head with the blackboard duster if we didn't get it. I blame that style of teaching on my perpetual loathing of anything to do with mathematics !

[MegaChibitalia]

@adsfasdkjfh So is 5, and 2...

[awesomeleah13]

she takes so long!!!!!

[awesomeleah13]

i hate her

[LadyRyuga]

I still dunno why I need to know prime factorization and things if my major is animation -_=; shouldn't I learn stuff like taxes and stuff :I oh well -_-; I'll be one mathy-animator :D

[adsfasdkjfh]

ONE AND TEN ARE FACTORS OF TEN

[adsfasdkjfh]

ONE AND TEN ARE FACTORS OF TEN