Monday, December 12, 2011

Divisibility Rules

Rule for 1- All whole numbers are divisible by 1

Rule for 2- All even numbers are divisible by 2 twice

Rule for 3- The sum of te digits is divisible by 3

Rule for 4- 4=2x2 all numbers divisible by 2

Rule for 5- All numbers endig in 0 or 5 eg: 5,10,15,20,25....

Rule for 6-If the number is divisible 2 and 3

Rule for 7- Use a calculator!

Rule for 8- 8=2x2x2 All numbers divisible by 2 thrice

Rule for 9- The sum of the digits is divisible by 9

Rule for 10- All numbers ending in 0 or 5 eg:10,20,30,40,50

1 comment:

  1. Awesome job! I think your divisibility rules will help people to figure out if a number is divisible by another. But i think you had the wrong rule for 2, I think it is supposed to be all numbers ending in an even number. But otherwise great job!