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!
Enigma 729: Obey the instructions
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From New Scientist #1884, 31st July 1993 [link] You will need to make six
cards labelled P, Q, R, S, T, U and each with an instruction on it as
follows: Ca...
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