Stage: 2 Challenge Level: 
This drawing shows the train track joining the Train Yard to all the stations labelled from A to S.
Find a way for a train to call at all the stations and return to the Yard.
Visualising. Combinations. Working systematically. Selecting and using information. Networks/Graph Theory. Famous mathematicians. Mathematical modelling. Mathematical reasoning & proof. Topology. Route inspection problems.
Published July 1999.
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