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 #91: Balls in boxes
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From New Scientist #3561, 20th September 2025 [link] [link] We have four
boxes numbered 1 to 4 and four balls numbered 1 to 4. How many ways can we
put the...
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