Investigate one strategy to win at rock, paper, scissors http://motherboard.vice.com/read/game-theory-rock-paper-scissors
Check out these winning strategies https://www.washingtonpost.com/news/wonk/wp/2015/05/08/how-to-win-any-popular-game-according-to-data-scientists/
Watch How to Calculate the Odds of Winning Powerball
Find a strategy game to play with a peer or family member. See if you can find a winning strategy online and try it out playing the game. Keep track on a table of how many times you will and how many you lose. Then describe what your strategy was, whether you followed it exactly or changed part way through the games. Why did it work or not work?