Me and a friend want to play chess on a roller coaster this weekend. In Coney Island. Please help. [more inside]
posted on May 16, 2008 - 13 answers

Help me create a function from a graph, details inside. [more inside]
posted on Nov 22, 2007 - 6 answers

Packing efficiency of 9" balloons? [more inside]
posted on Jul 17, 2007 - 13 answers