Puzzle: Sitting Close
August 12, 2009 pm31 11:51 pm
People trade problems at math conferences for math teachers. This one, which I picked up last week, I liked a lot. See what you think.
Ten people are seated on a stage, in a row of ten seats. They get up, run around, and sit back down… and all end up in the seat they started in, or just one away from the seat they started in. How many ways could this happen?
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JD2718 
Are the seats in a ring or a row?
ha! A row. Let’s make a ring the next puzzle. Or an extension/supplement.