# Divisibility Rules

### Kimberly Jessica

## 6

Ex:

1. 12. 12 is divisible by 2 and 3. 12 / 3 = 4. 12 / 2 = 6

2. 24. 24 is divisible by 2 and 3. 24 / 2 = 12. 24 / 3 = 8

3. 664. 664 is divisible by 2 but not 3. 664 / 2 = 332. 664 / 3 = 221 R 1.

## 9

Ex:

1. 5643. 5+6+4+3= 18/9=3. Good

2. 333. 3+3+3= 9/9= 1. Good

3. 721. 7+2+1= 10/9=1 R1. Bad

## Divisibility Rules

## 2 If a number ends in 0,2,4,6,8 ( an even number) then it will be divisible by 2. But it must be a counting number. ( 1,2,3 and so on.) Ex: 1. 1000 / 2= 500 2. 224 / 2 = 112 3. 668 / 2 = 334 | ## 3 If the sum of a numbers digits is divisible by 3. Again make sure they are counting numbers. So you add up each of the digits of your sum and divide that by 3. If you get no remainders then that sum is divisible by 3. Ex: 1. 36 3 + 6 = 9 / 3 = 3 ( it's divisible by 3.) 2. 65 6 + 5 = 11 / 3 = 3,R 2 ( it's not divisible by 3.) 3. 90 9 + 0 = 9 / 3 = 3 ( it's divisible by 3.) | ## 4 When a number last two digits are divisible by 4. Use counting numbers. Ex: 1. 348 48 / 4 = 12 Good 2. 223. 23 / 4 = 5 R3. Bad 3. 144. 44 / 4 = 11. Good |

## 2

Ex:

1. 1000 / 2= 500

2. 224 / 2 = 112

3. 668 / 2 = 334

## 3

Ex:

1. 36 3 + 6 = 9 / 3 = 3 ( it's divisible by 3.)

2. 65 6 + 5 = 11 / 3 = 3,R 2 ( it's not divisible by 3.)

3. 90 9 + 0 = 9 / 3 = 3 ( it's divisible by 3.)