This is a challenge logic problem for a middle school math class (7th, 8th or 9th grade). It involves some out of the box thinking in order to solve. It was used as a group challenge question, as well as an extra credit question for those students who happen to finish assignments early. It is a .pdf file, and contains three pages. Page two is a hint for those students/groups that might get stuck, and page three explains the solution to the problem.