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Here is a new puzzle by Nikolai Chernyatiev.
Puzzle. Five sages, who all know one another, are blindfolded, seated in a row in a dimly lit hall, and then have their blindfolds removed. Each sage can see both of their immediate neighbors, but no farther; the sages at the ends know that they are at the ends. After that, each sage writes down one of t...
Alexander Karabegov sends me new puzzles from time to time. This time, however, it is not a puzzle but a math joke.
Joke. If a woman gives birth to a child at the age of 30, then 60 years earlier, her child was twice as old as she was. Whatever that means.
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