Clifton heads off to Washington, D.C. tomorrow to participate in the National MathCounts Competition. He is one of only four Maine middle school students who qualified as a member of the State of Maine team.
The problems at the national level are really hard, but here's one of the easier sprint round questions from 2009 (try to solve in 1 minute or less):
Dennis was playing FreeCell. If he completed one game every five minutes and won exactly 80% of the games he played, how many minutes did he stay at the computer to win exactly 60 games?