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?
Thank you to everyone who sent in a
solution to this problem. Most of you agreed that there
was just one piece of string in the first picture, two in the
second, one in the third and two in the fourth.
Thomas from St Luke's School in Frodsham
explained how he worked out the number of pieces of string in the
This is very clear - thank you Luke.
Well done also to Diana, Kate and Georgia from
Danebank School who also wrote clear explanations of how they
counted the pieces of string.