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 #88: Double base
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From New Scientist #3558, 30th August 2025 [link] [link] In the grids
below, the top row represents 0 and the bottom row represents 1. For each
puzzle, cho...
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