You know a number is divisible by 2 if it is even. You know a number is divisible by 3 if the sum of the digits can be divided by 3. You know what number is divisible by 6 if the number is both divisible by 2 and 3. You know a number is divisible by 4 if the right two digits is divisible by 4 in this case 36. and you know a number is divisible by 9 if the sum of the digits is able to be divided by 9. Hope this helps!
