Divisibility Rules
by Marie Gilbert
1. 3: If the sum of the digits is divisible by 3.
2. 4: If the last two digits form a number divisible by 4.
3. 6: If the number is divisible by 2 and 3.
4. 9: If the sum of the digits is divisible by 9.
5. 466
6. 75497
7. 12
8. 384
9. 300
10. 9738
11. 852852
12. 63
13. 2: If the last digit is an even number.
14. 5: If the last digit is 0 or 5.
15. 10: If the last digit is 0.
16. 300
17. 55
18. 30
19. 660
20. 384038
21. 38
22. 12
