A number is divisible by 2 if
it is an even number
A number is divisible by 3 if
the sum of the digits is divisible by 3
A number is divisible by 4 if
the last two digits are both zeros or if they are divisible by 4
A number is divisible by 5 if
if it ends in 0 or 5
A number is divisible by 6 if
if it is even and is divisible by 3
A number is divisible by 9 if
the sum of the digits is divisible by 9
A number is divisible by 10 if
it ends in 0