Among the following, a  number not divisible by 3 is  

A number is divisible by 3 if the sum of digits is divisible by 3.

232 is not divisible by 3 since sum of digits of $232(2+3+2=7)$ is not divisible by 3.

543 is divisible by 3 if sum of digits of $543(5+4+3=12)$ is divisible by 3.

12825 is divisible by 3 if sum of digits of $12825(1+2+8+2+5=18)$ is divisible by 3.

94956 is divisible by 3 if sum of digits of $94956(9+4+9+5+6=33)$ is divisible by 3.