Moira is late for school. What is the shortest route she can take from the school gates to the entrance?
How many different journeys could you make if you were going to visit four stations in this network? How about if there were five stations? Can you predict the number of journeys for seven stations?
This train line has two tracks which cross at different points. Can
you find all the routes that end at Cheston?
You might like to try How Many Pieces? before you have a look at this problem.