Division Rules

1: Any number is divisible by one.

2: Numbers that end with 0, 2, 4, 6, or 8 is divisible by two.

3: Add up the sum of the numbers digits, and if that is divisible by 3 then the number is divisible by 3.

4: If the last two digits in the number is divisible by four then the number is divisible by four.

5: Numbers that end with 5 and 0 can be divided by 5.

6: If the number is divisible by 2 and three, the number is divisible by 6.

7: Remove the last digit, double the last digit, then subtract the doubled number from the digits left. If the number is still too big, repeat the process.
eg. If you want to find out if 348 is divisible by 7 take out the last digit which is 8 then double it which become 16. Subtract 16 by 34 (the remaining digits) which gives you 18. Which means 348 is not divisible by 7.

8: If the last 3 digits of the number is divisible by 8 then the number is divisible by 8.

9: If the sum of the number’s digit is divisible by 9 then the number is divisible by nine.

10: Any number that ends with 0 is divisible by 10.

Discovered by Yiwen