Penny has announced the winners of the witch contest and my two favourites weren't amongst them... so now I'll never know who did them... unless someone tells me....
my absolute favourite was the dark 68 and my favourite cute one was the tortoise 138.
Anyone know???
Update: the tortoise is by happy d
BrainTwister #61: Mark to mark
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From New Scientist #3531, 22nd February 2025 [link] [link] Given a ruler
that you know is 6 units long, with a mark 2 units from one end, it is
possible to...
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