Category Archives: Puzzles

Tossing a biased coin

Each Friday, the ever-entertaining Professor Richard Wiseman poses on his blog a problem for readers to solve. He posts the solution on Monday. (Wiseman is at the University of Hertfordshire in England, so watch out if you are several time … Continue reading

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Splitting the Restaurant Bill

The problem Alice and Brian go out to lunch. Brian drinks only water with his sandwich, but Alice has a glass of wine and a more expensive sandwich. After the meal, Alice leaves her credit card on the table and … Continue reading

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The Mirror Puzzle

Most people laugh when I ask this question. Then they tieĀ  themselves into knots trying to answer it. Explanations are usually accompanied by diagrams featuring stick figures. Actually you can answer it in less than 50 words, without diagrams. Here’s … Continue reading

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