| Divisible By | Rule | Example |
| 2 |
Last digit is even(0,2,4,6,8) |
128,120,134 last digit is 8,0,4 |
| 3 |
The sum of digit should be divisible by 3 |
684 (6+8+4=18/3) yes |
| 4 |
Last 2 digit should be divisible by 4 |
1416 (16/4) yes |
| 5 |
Last digit should be 0 or 5 |
185,190 yes last digit is 5,0 |
| 6 |
Sum of digit should be divisible by 2,3 |
1104=1+1+4=6/2=6/3 |
| 7 |
double last digit and subtract from left numberthen divide by 7 should be done |
679=9*2=18=67-18=49/7 yes |