2,3,4,5,6,9 and 10
This is a very easy thing to learn.
2-If the last digit is even (0,2,4,6 or 8
3-If the sum of the digits is divisible by 3
4-If the last two digits from a number divisible by 4
5- If the last digits is 0 or 5
6-If the number is divisible by both 2 or 3
9-if the sum of the digits is divisible by 9.
10-if the last digits are 0