1. Ways to Check for Divisibility
Divisibility Rules
Sound=20century
Ways to Check for Divisibility

2. Dividing by 2 All even numbers are divisible by 2
Even numbers are numbers that end with either 2, 4, 6, 8, or 0
groovy

3. Are these numbers divisible by 2?
Now You Try
Are these numbers divisible by 2?
458
1279
759
555
1050

4. Dividing by 3 Add up the digits of the number
If that number is divisible by 3, then the original number is
If your sum is still a big number, continue to add the digits
Nice

5. Dividing by 3 3 7 8
For example, take the number
Add up the digits of the number 18 7 + 3 + 8 =
If that number is divisible by 3, then the original number is
Is 18 divisible by 3?
Oh yeah!
If your sum is still a big number, continue to add the digits
1 + 8 = 9
Is 9 divisible by 3?

6. Are these numbers divisible by 3?
Now You Try
Are these numbers divisible by 3?
639 56 86
360
468

7. Dividing by 4 If the last 2 digits together are divisible by 4
(and the number is even)
Great scott

8. Are these numbers divisible by 4?
Now You Try
Are these numbers divisible by 4?
584
261 56
920
767

9. Dividing by 5
If the number ends in 5 or 0
Great balls of fire

10. Are these numbers divisible by 5?
Now You Try
Are these numbers divisible by 5?
554
6890
345
902
845

11. If the number is divisible by 2 and 3
Dividing by 6
If the number is divisible by 2 and 3
nice

12. Are these numbers divisible by 6?
Now You Try
Are these numbers divisible by 6?
897
258
630
345 84

13. Dividing by 7
No rule

14. Dividing by 8
If the last three digits are divisible by 8 (and the number is even).
If the number is divisible by 2,
then by 2 again, and then by 2 again
Sound=impressive
So what type of number does it have to be?

15. If that number is divisible by 9 then your number is divisible by 9
Dividing by 9
Similar to dividing by 3
Add up digits
If that number is divisible by 9 then your number is divisible by 9

16. Dividing by 9
For example, take the number 924,561
Add up the digits of the number 27 9 + 2 + 4 + 5 + 6 + 1 =
If that number is divisible by 3, then the original number is
Is 27 divisible by 9?
Oh yeah!
If your sum is still a big number, continue to add the digits
2 + 7 = 9
Is 9 divisible by 9?

17. Are these numbers divisible by 9?
Now You Try
Are these numbers divisible by 9?
578
398 48
1903
490

18. If the number ends with a 0
Dividing by 10
If the number ends with a 0
All 2 easy

19. Are these numbers divisible by 10?
Now You Try
Are these numbers divisible by 10?
578
398 48
1903
490

20. REVIEW Divisible by 2 Divisible by 3 Divisible by 4 Divisible by 5
Is this the end

21. That's all Folks!
That’s all folks