Did you solve it? Drive your car (and brain) round the block
by Alex Bellos from Science | The Guardian on (#4NZR6)
The solution to today's puzzle
Earlier today I set you this puzzle:
You are in a big city where all the streets go in one of two perpendicular directions. You take your car from its parking place and drive on a tour of the city such that you do not pass through the same intersection twice and return back to where you started. If you made 100 left turns, how many right turns did you make?
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