I use math in games. I play a game called Math Tag. In this game, there is an answerer and a questioner. The answerer would pick a questioner to tag. That questioner would pick a place to stay in, also the answerer. The questioner asks a challenging problem to the answerer. You have only 45 seconds to answer the problem. If it is incorrect or if time runs out you can not walk closer to the questioner. If you tag the questioner you win. Also, the questioner wins for teaching math and learning at the same time.