Divisibility Rules

By: Patrick p. Patrick R. Rodney and Anthony.

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Rule 2

If the last digit is even -18,968


Rule 3

If the sum of all digits is divisible by three - 36


Rule 4

if the last two digits have a sum a number divisible by 4 - 162


Rule 5

if the last digit is 0 or 5 - 260


examples of divisibility rules

1.345 is divisible by 3,5

345 is divisible by 3 because if you add them all up it equals 12 and 3 is divisible by 12

the number ends in 5 so it's divisible by 5

2.256 is divisible by 2

256 is an even number so it is divisible by 2

3.459 is divisible by 2,3,6,and9

the number is even so it's divisible by 2

the sum of these digits is 18

18 is divisible by 3,and 9

the number is divisible by 2 and 3 so it is divisible by 6



non- examples of divisibility rules

234- This number is not divisible by 5 because if you add all number it equals nine and the last number is not a nine. It is not 6 the last two numbers are not divisible by 6 and when you add all the number together it equals 9. It not 10 because it does not have a 0 at the end.

120- It is not 6 because 20 is not a multiple of 6 and when you add the number it equals 3 not 6. It is not 9 because when you add all the number you het 3 not 9 and 20 is not a multiple of 9.

765- It is not 3 because when you add all the number you get 13 and 13 is not a multiple of 3. It is not 6 because when you up all the numbers you get 13 and 13 is not a multiple of 6 and 3 is not a multiple of 13. It is not 9 or 10 because it does not have 0 and when you add them up you get 13 and 13 is not a multiple of 9.

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