Divisibility Rules - Skyndipróf
| __ | 1. | Add up my digits | | A. | Answer must end an a 0 | | __ | 2. | Composite | | B. | 2 rule | | __ | 3. | I am divisible by 5 | | C. | 3 and/or 9 rule | | __ | 4. | I am divisible by 10 | | D. | Answer must end in a 0 or 5 | | __ | 5. | I am divisible by even numbers | | E. | The 4 rule | | __ | 6. | If the 2 and 3 rule works | | F. | only 1 and the number are its factors | | __ | 7. | look at my last two numbers | | G. | The 6 rule works | | __ | 8. | look at the last three numbers | | H. | the 8 rule | | __ | 9. | Neither prime nor composite | | I. | I have more than 2 factors | | __ | 10. | Prime | | J. | The #'s 0 and 1 |
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