Prime Numbers, Factoring, Factorization & Divisibility
I won't introduce this chapter other than to say this: If you haven't memorized your times tables yet, do it now. You'll thank yourself for years to come. This is not your final warning, as you'll see in the videos below...
Divisibility Rules (free)
In this video I cover the divisibility rules which help you figure out if a number is divisible by 2, 3, 4, 5, 6, 7, 8, 9 or 10. They're the next best thing to actually, you know, memorizing your times tables. Did you get that hint? Memorize your times tables already! Gotta be a good app for that.
Prime Numbers, Factors & Factorization (free)
In this video I get into what prime numbers are, and how to do a prime factorization, all of which will be key when you're working on simplifying roots and fractions in later chapters. Also just two reminders: 1) one is not a prime number, since most people forget that, and 2) memorize your times tables!
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)