This month's puzzle is a brief study of network theory whose roots began with a problem that was first approached in 1735 in Köningsberg, Prussia (now Kalinigrad, Russia), In this puzzle, students attempt to draw routes that cross every bridge in a bridge puzzle once and only once.

The Bridge Crossing Challenge (387k)

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This puzzle is one of many found in our publication "Puzzle Play", which contains a collection of mathematical puzzles. Puzzle Play can be purchase from on online store.