Search "Divisibility"
Common divisibility examples
Common Divisibility Examples
Khan Academy
Prime factorization
513
07:54
The why of the 3 divisibility rule
Why you can add the digits to see if something is divisible by 3
Khan Academy
Divisibility tests
625
05:01
The why of the 9 divisibility rule
Why you can test divisibility by 9 by just adding the digits
Khan Academy
Divisibility tests
525
05:07
Divisibility intuition
Example of Sal working on KA Divisibility Module: http://www.khanacademy.org/math/arithmetic/factors-multiples/e/divisibility_intuition
Khan Academy
Divisibility and factors
541
03:09
