Stage: 3 Challenge Level: 
An extension to the famous Konigsberg problem that offers a chance to experiment with different conditions and to test some conjectures.
Games. Mathematical reasoning & proof. Generalising. Interactivities. Creating expressions/formulae. Topology. smartphone. Networks/Graph Theory. Mathematical modelling. Visualising.
Published July 2004,August 2004.
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NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk