Divisibility Rules

Dan, Treyten, Douglas

Divisibility Rules

2 = If the last digit is even, the number is divisible by 2.
3 = If the sum of the digits is divisible by 3, the number is also.
4 = If the last two digits form a number divisible by 4, the number is also.
5 = If the last digit is a 5 or a 0, the number is divisible by 5.
6 = If the number is divisible by both 3 and 2, it is also divisible by 6.
8 = If the last three digits form a number divisible by 8,
then so is the whole number.
9 = If the sum of the digits is divisible by 9, the number is also.
10 = If the number ends in 0, it is divisible by 10.



Examples

632: 2, & 4 - 2, Because it is even. 4, Because the last two digits are 32, and 32 is a multiple of 4.


786: 2,3, & 6- 2, Because it is even. 3, Because all the digits all the digits added together is 21, & 21 is divisible by 3. 6, Because it is divisible by 2 & 3.


1,239: 3, Because all the digits added together equals 15, & 15 is divisible by 3.


149,786 is NOT divisible by 5 because it does not end with a 5 or a 0.