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
Enigma 773: Duodecimal
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From New Scientist #1928, 4th June 1994 [link] Two warnings about the sum
shown here: the first is that it is a sum in base 12 throughout; the second
is th...
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