Danny Gregory (Everday Matters) is offering some nice prizes for the best illustrated letters he receives before Christmas.
I think this is a fun idea!
BrainTwister #116: Curiouser and curiouser
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From New Scientist #3585, 7th March 2026 [link] [link] There is a set of
numbers (sometimes called curious numbers) that, when squared, return the
same set...
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