math challenge

After two and a half years of munching through our members' solutions, Minus the Math Shark has finally retired. But wait! That doesn't mean the fun is over. We have archived nearly 100 of Minus' math problems on the Previous Challenges page. Take a look and see how Minus has happily tortured DEN-izens with his sneaky math questions and wry wit. (Psst...there are also full solutions to all of the questions.)