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While we wait for Bilbo1967 to provide a quiz, here's a quick question that's this week's Richard Wiseman's Friday Puzzle:
Yesterday my friend and I started to walk down a road. We began our walk at the same time, from the same point, and headed in the same direction. I walk at a constant speed of 5 km/h and my friend walks at a constant speed of 6 km/h. Throughout the walk a dog ran between the two of us again and again, with a constant speed of 10 km/h
How far did the dog travel in 1 hour?
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