Double trouble from Martin Gardner
UPDATE: Solutions now posted here.
Hello guzzlers,
Martin Gardner, who wrote dozens of books of recreational mathematics, would have been 102 last Friday. In the years since he died, his friends and fans have started a global movement called Celebration of Mind, which encourages people to put on puzzle-themed events on or around the date of his birthday.
Continue reading...via Alex Bellos's Monday puzzle http://ift.tt/2emFfA2
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