Number 2 rule: If it ends with a 0, 2, 4, 6, or 8.

Number 3 rule: If the sum of the digits is a multiple of 3.

Number 4 rule:If the last two digits are a multiple of 4.

Number 5 rule: If it ends with a 5 or a 0.

Number 6 rule: If it is divisible by 2 and by 3.

Number 9 rule: If the sum of the digits are a multiple of 9.