1. If a number is an even number and ends in 0, 2, 4, 6 or 8, it is divided by 2.

2. A number is divisible by 3 if the sum of the digits is divisible by 3. Consider the number 12 = 1 + 3 and 3 is divisible by 3.

3. If a number is divisible by 2 and 3, then it is divisible by 6, since 6 is the product of 2 and 3.

4. If the last digit is 0 or 5, it is divisible by 5

5. If a number is divisible by 9, the sum of the digits is divided by 9. Let us consider the example, 4518 = 4 + 5 + 1 + 8 = 18, which is divisible by 9.

6. If the number is divisible by 8, the last three digits of the numbers are divisible by 8.

7. If a number is divisible by 2 and 3, then it is divisible by 6, since 6 is the product of 2 and 3.

8. If the final digit of the number is 0, it is divisible by 10.