| A | B |
|---|
| A number is divisible by 2 if... | if it ends in an even number |
| A number is divisible by 3 if... | if the sum of the digits are divisible by 3 |
| A number is divisible by 4 if... | A n if the last two digits are divisible by this number |
A number is divisible by 5 if...,  | if the number ends in a zero or 5 |
A number is divisible by 6 if...,  | if the number is divisible by 2 and 3 |
A number is divisible by 7 if...,  | If the result of doubling the last digit, and subtracting it from the rest of the number is divisible by the difference |
A number is divisible by 8 if...,  | If the last three digits are divisible by this number |
| A number is divisible by 9 if... | If the sum of its digits is divisible by 9 |
A number is divisible by 10 if...,  | If the number ends in a zero |
| A number is divisible by 11 if... | If the difference of the odd and even digits are divisible by this number. |
| A number is divisible by 12 if... | if it the number is divisible by 3 and 4 |
| A number is divisible by 13 if... | if the result of multiplying the last digit by 9 and subtracting it by the rest of the number is divisible by this number. |
