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Can you solve it? The pals that broke the internet, ten years on

By The Guardian   |   1 month ago
Can you solve it? The pals that broke the internet, ten years on

A maths olympiad question from Singapore, known as 'Cheryl's birthday problem,' gained viral success after being published on the Guardian website ten years ago. The unexpected popularity led to the creation of a puzzle column, with almost 250 puzzles released since.

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