Oops. I forgot to type base 3 after the answer. 12111 (base 3) . Now that I think about it, there wouldn't be a need for 3-0. I don't know if this will mean anything to you but think about this. In base 10, we have 10 digits (0-9). After 9, we go to 10. In base 3, we have 3 digits (0-2). After 2, we don't go to 3, we go to 10 because two is the highest digit in base 3. Here is what I did.