Ok I want everyone who's confused to read this. So, people seem to think that Gai's team is Team 9. If you haven't noticed, in the anime/manga, there are 27 students to a class. What I did, regardless of the second explanation I'm about to give, I added 3 more students to make 30 students of a class each year participating in the Genin Exams to make it even. I did that on PURPOSE. Even if there wasn't 30 students, Team 9 would be reused. You see, what would happen is that this years students, Naruko's class, would set up the people on team's 10, 8, and 7 next year to automatically fail (at least if you're buying into the whole Team Gai/Team 9 thing). But how can those numbers be reused, you ask? Because the HAVE to reuse them. Why do you think Kishi changed numbers to names after that? Because he screwed up. Having no Team 9 was a joke, he probably thought that he wanted to just skip the 9 to make Shika's team to sound catchy for the english viewers. They do reuse team number's each year, because if they didn't, all the teams would be in the hundreds by the time they got to Naruto's team.
Sorry, trolling done. I'm just a little upset, that's all.