MetaFilter posts tagged with logic and puzzles

The Mathemagician and Pied Puzzler, and others

cog_nate — Wed, 01 Oct 2008 19:21:50 -0800

The Mathemagician and Pied Puzzler (PDF, rough table of contents here) is a collection of puzzles created by members of the Gathering 4 Gardner Foundation, in tribute to the man himself (previously). Also freely available at the G4G site is Puzzle Craft (PDF), by Stewart Coffin. (The Puzzling World of Polyhedral Dissections, also by Coffin, is available here.)

Logic puzzles

Upton O'Good — Wed, 28 Nov 2007 21:52:34 -0800

A virtually unlimited supply of randomly-generated logic puzzles, in a variety of sizes and difficulties: Nonograms. Slither Link. Nurikabe. Bridges. Light Up.

Labor Intensive

painquale — Fri, 22 Sep 2006 13:17:32 -0800

Labor Intensive is a new online puzzle extravaganza in the style of the MIT Mystery Hunt and the aforelinked Puzzle Boat. Appease the Gods by performing twelve puzzly labors. Good luck!

Of Knights and Knaves

skoosh — Tue, 15 Mar 2005 07:12:46 -0800

There is an island where all the inhabitants are either knights or knaves. Knights always tell the truth, and knaves always lie [PDF]. Can you tell which is which?

PuzzleDonkey4 - Are you up to the challenge?

willnot — Wed, 01 Dec 2004 00:11:14 -0800

Arghhhhh!!! Aghhhhhhhh! Arghhhhhhh!!!

Cheats for PuzzleDonkey4 Available here

PuzzleFilter.

limitedpie — Wed, 11 Aug 2004 21:08:52 -0800

"WARNING!!! The puzzles on this site are very difficult, and most require the use of a good spreadsheet program in order to solve them. It will take many hours, perhaps days, to solve each puzzle..."

Mack Twain — Sun, 17 Mar 2002 13:29:14 -0800

A few logic puzzles by Raymond Smullyan . Professor of mathmatics, logic, and philosophy, lifelong magician and concert caliber piano player. Even the titles of his books are fun. Anyone familiar with him?

Shadowkeeper — Fri, 25 May 2001 10:22:29 -0800

What Color is My Hat? I [heart] these mathematical conundrums -- simple, easy-to-state, seemingly obvious logic problems that have solutions that completely defy common sense. Here's another you can spring on a friend: "You want to fry up three pieces of french toast. You have a frying pan that is just large enough to accomodate two pieces of bread at a time. If it takes you 30 seconds to fry one side of bread, and each piece of must be fried on both sides, how long will it take you to cook up three pieces (assuming that the act of flipping a piece or adding/ removing it to or from the pan takes no time). Think about it. Answer inside.