1. ___________ ____
2, 3, 4, 5, 6, 9, 10

2. “Divisible BY” What does it mean?

3. “Divisible by” means:
If you divide one number by another, the result is a whole number WITHOUT a remainder.
Examples:
12 ÷ 6 = 2 No remainder
15 ÷ 5 = 3 No remainder

4. Divisibility Rule 2
A number is divisible by 2 if the last digit is even. (0, 2, 4, 6, 8)
Examples:
Review Even numbers: ghosteven

5. Now You Try: 572 1464 249 Which number IS NOT divisible by 2?
Need More Practice: Numbers Divisible by 2

6. WONDERFUL

7. It ends in a 0, 2, 4, 6, or 8.

8. Divisibility Rule 3
A number is divisible by three if the sum of the digits is divisible by 3.
Examples:
= ÷ 3 = 4 No Remainder
= ÷ 3 = 6 No Remainder

9. Now You Try: 572 1464 279 Which number IS NOT divisible by 3?
Need More Practice: Numbers Divisible by 3

10. The sum is divisible by 3.

11. WONDERFUL

12. Divisibility Rule 4
A number is divisible by 4 if the last two digits are divisible by 4.
Examples:
÷ 4 = 5
÷ 4 = 18

13. Now You Try: 564 4101 188 Which number IS NOT divisible by 4?
Need More Practice: Numbers Divisible by 4

14. WONDERFUL

15. The last 2 digits are divisible by 4.

16. Divisibility Rule 5
A number is divisible by 5 if the last digit is a 0 or 5.
Examples:
615 ends in a 5
1480 ends on a 0

17. Now You Try: 9820 779 560 Which number IS NOT divisible by 5?
Need More Practice: Numbers Divisible by 5

18. The number ends in a zero or a five.

19. Wonderful

20. Divisibility Rule 6
A number is divisible by 6 when it is divisible by 2 AND 3. (prime numbers)
Examples:
408 ends in an even number (2 rule)
sum of the digits is divisible by 3
Review prime and composite numbers: Prime and Composite Numbers

21. Now You Try: 8700 523 7602 Which number IS NOT divisible by 6?
Need more practice? Numbers Divisible by 6

22. Way To Go!!

23. This number is divisible by 2 and 3.

24. Divisibility Rule 9
A number is divisible by 9 if the sum of the digits is divisible by 9.
Examples:
= ÷ 9 = 2
= ÷ 9 =2

25. Now You Try: 9873 636 5541 Find the number that IS NOT divisible by 9.
Need More Practice: Numbers Divisible by 9 and 10

26. The sum of the digits is divisible by 9.

27. Great Job!!!

28. Divisibility Rule 10 A number is divisible by 10 is it ends in a ZERO.
Example:
7630 ends in a zero
410 ends in a zero

29. Now You Try:
Find the number that IS NOT divisible by ten.
56,

30. The number ends in a ZERO.

31. Way To Go!!

32. Congratulations!!!
Now you are ready to speed through your factors, factor pairs, and determining if numbers are prime or composite!!