A little game

Our lesson of course were math. He told us about a topic, none of us knew and he didn't tell us at all how to solve the equations, because we had to "figure it out" ourselves. We constantly asked him questions, so he stood up.

"Ok, I got a deal for you." Mr. Miller said. "I compete against one of you. The rest of you writes down any question, like: What is the capital of China. Whoever answeres first wins one round. The game ends, when more than half of the class want to stop. Or when the lesson is over."

Alex, who is the smartest person in the class, asks: "And how does this help us solving the equations?"

Mr. Miller smiled and answered: "For each round you win, I'll help you solve one of the equations. But for every round I win the person who lost, has to take off one piece of clothing."

Everyone in the class went silent, because we we're all shocked. Jim, who was always horny, asked: "And if your opponent is naked?" "Then my opponent has to do forfeits. Who wants to face me?"

As no one raised their hand, Mr. Miller said: "Ok, then the class will choose a person."