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'The Money Maze' printed from http://nrich.maths.org/
Go through the maze, collecting and losing your money as you go.
You may not go through any cell more than once, and can only go
into a cell through a gap, for example, you may not go from $5$ to
$6$, or from $7$ to $3$.
Which route gives you the highest return? How much is it?
Which route gives you the lowest return? How much is it?