Divisibility Rules
2---If the last digit is even, the number is divisible by 2.
3---If the sum of the digits is divisible by 3, the number is also.
4---If the last two digits form a number divisible by 4, the number is also.
5---If the last digit is a 5 or a 0, the number is divisible by 5.
6---If the number is divisible by both 3 and 2, it is also divisible by 6.
7---Take the last digit, double it, and subtract it from the rest of the number;
if the answer is divisible by 7 (including 0), then the number is also.
8---If the last three digits form a number divisible by 8,
then so is the whole number.
9---If the sum of the digits is divisible by 9, the number is also.
10---If the number ends in 0, it is divisible by 10.