| A | B |
|---|
| A number is divisible by 2 if | it is even (ends in 0, 2, 4, 6, or 8). |
| A number is divisible by 3 if | the sum of the digits is divisible by 3. |
| A number is divisible by 4 if | the last two digits are divisible by 4 or if it ends in "00." |
| A number is divisible by 5 if | it ends in 0 or 5. |
| A number is divisible by 6 if | it is divisible by both 2 and 3. |
| A number is divisible by 7 when | you double the last digit and subtract it from the rest of the number; if the answer is div. by 7 (including 0), then the number is div. by 7. |
| A number is divisible by 8 if | the last three digits are divisible by 8. |
| A number is divisible by 9 if | the sum of the digits is divisible by 9. |
| A number is divisible by 10 if | it ends in zero. |
