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The Fall 1978 issue of Pi Mu Epsilon Journal included this problem, submitted by Pier Square. Four men are playing bridge. Their names are Banker, Waiter, Baker, and Farmer, and, as it happens, each man’s name is another man’s job. Mr. Baker’s partner is the baker, Mr. Banker’s partner is the far...

The riddle below tells the story of a travel. A travel starts, for our hero From a spot, where the time is zero To fantasy land she'll go first Though only water, she'd die of thirst Then east or west, it doesn't matter Either way, that's where I scatter As far as possible she'll travel But wh...

There is a well-studied problem (including in several posts on this site) which asks for an algorithm for simulating a fair coin flip (or die roll) with a biased coin/die. Much work has been done on finding algorithms that are "maximally efficient," usually in the sense of minimizing the expected...

Which letter should be placed in the last figure? Why?

This puzzle is a symmetrical version of Three-player Avalon (transmitting private knowledge over a public channel). I came across this version (for which I think I have a solution) while looking for solution to the other problem (for which I do not). Basic rules Alice, Bob and Eve are playing a g...

Had a crack at creating a 12x12 cryptic crossword after beginning to love them. Any comments / suggestions / tips / feedback are greatly appreciated! Enjoy! Across I came after your plant [5] Loud as a bee [4] Perhaps ask mentor Qui? [8, 4] Pests posts penetrated by Greek character [6] Innocent ...

You’re a logician who wants to know which of two roads leads to a village. Standing nearby, inevitably, are three natives: one always lies, one always tells the truth, and one answers randomly. You don’t know which is which, and you can ask only two yes-or-no questions, each directed to a single...