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08-25-2013, 05:24 AM

Divisibility Rules from 2 to 13

A number is divisible by:

If:

2

The last digit is even (0, 2, 4, 6, or 8).

3

The sum of the digits is divisible by 3.

4

The number formed by the last two digits of the original number is divisible by 4.

5

The number ending in a 0 or a 5.

6

The number is divisible by both 2 and 3.

7

The last digit of the number is multiplied by 2 and subtracted from the rest of the number and the answer is either 0 or divisible by 7.

8

The last three digits form a number divisible by 8.

9

The sum of the digits is divisible by 9.

10

The last digit is 0

11

You add every second digit and then subtract all other digits and the answer is zero or a multiple of 11.

12

The number is divisible by both 3 and 4.

13

You remove the last digit from the number, then subtract 9 times the deleted digit from the remaining number. If what is left is divisible by 13, then so is the original number.

Hope these help!!;);)

A number is divisible by:

If:

2

The last digit is even (0, 2, 4, 6, or 8).

3

The sum of the digits is divisible by 3.

4

The number formed by the last two digits of the original number is divisible by 4.

5

The number ending in a 0 or a 5.

6

The number is divisible by both 2 and 3.

7

The last digit of the number is multiplied by 2 and subtracted from the rest of the number and the answer is either 0 or divisible by 7.

8

The last three digits form a number divisible by 8.

9

The sum of the digits is divisible by 9.

10

The last digit is 0

11

You add every second digit and then subtract all other digits and the answer is zero or a multiple of 11.

12

The number is divisible by both 3 and 4.

13

You remove the last digit from the number, then subtract 9 times the deleted digit from the remaining number. If what is left is divisible by 13, then so is the original number.

Hope these help!!;);)