17 posts tagged with Math *and* puzzles. (View popular tags)

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The Peg Solitaire Army is a problem spun off from a classic recreation, and yet another example of the golden ratio turning up where you least expect it. If you want to look at the game more deeply, George Bell's solitaire pages are the ne plus ultra: There's more about the solitaire army (and variants), ... [more inside]

posted by Wolfdog on Aug 15, 2014 - 6 comments

posted by Wolfdog on Aug 15, 2014 - 6 comments

Visual Patterns. Here are the first few steps. What's the equation?

posted by Wolfdog on Feb 18, 2014 - 19 comments

posted by Wolfdog on Feb 18, 2014 - 19 comments

"Gary Foshee, a collector and designer of puzzles from Issaquah near Seattle walked to the lectern to present his talk. It consisted of the following three sentences: "I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?"" [more inside]

posted by andoatnp on May 25, 2010 - 233 comments

posted by andoatnp on May 25, 2010 - 233 comments

Moving Remy in Harmony - Pixar's Use of Harmonic Functions. [more inside]

posted by Wolfdog on Apr 15, 2010 - 38 comments

posted by Wolfdog on Apr 15, 2010 - 38 comments

The Sexaholics of Truthteller Planet - yes, it's one of those rotten logic problems, one of many that can be found at Tanya Khovanovaâ€™s Math Guide to the MIT Mystery Hunt.

posted by Wolfdog on Jan 13, 2010 - 21 comments

posted by Wolfdog on Jan 13, 2010 - 21 comments

A gathering of puzzles including many old chestnuts but also perhaps one or two you haven't met before.

posted by Wolfdog on Dec 16, 2009 - 29 comments

posted by Wolfdog on Dec 16, 2009 - 29 comments

posted by cog_nate on Oct 1, 2008 - 9 comments

MEFIEach letter corresponds to a number 0-9. The solution is unique. [more inside]

META

+ ASKME

-------

FILTER

posted by Upton O'Good on Sep 3, 2008 - 27 comments

Interactive mathematics miscellany and puzzles, including 75 proofs of the Pythagorean Theorem, an interactive column using Java applets, and eye-opening demonstrations. (Actually, much more.)

posted by parudox on Dec 1, 2007 - 11 comments

posted by parudox on Dec 1, 2007 - 11 comments

SlitherLink - a little spatial-numerical puzzle. Here's a better exposition of the rules from the puzzle's inventors, and another collection of puzzles. Oh, and a little survey of other sneaky, snaky puzzles.

posted by Wolfdog on May 31, 2007 - 18 comments

posted by Wolfdog on May 31, 2007 - 18 comments

Su Doku. Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. That's all there is to it. It doesn't sound like much, but it's as addictive as hell. The Times is one publication with a daily puzzle (may be unavailable to overseas readers.) There a tuturial and sample puzzle here (flash).

posted by salmacis on Dec 10, 2004 - 6 comments

posted by salmacis on Dec 10, 2004 - 6 comments

Nick's Mathematical Puzzles. Something to keep you on your toes and exercise your brain this Friday. [not Flash]

posted by Johnny Assay on Oct 1, 2004 - 5 comments

posted by Johnny Assay on Oct 1, 2004 - 5 comments

Maths puzzles and more problems. Found whilst searching for the fiendish the Monty Hall Problem. A Tangled Tale, indeed.

posted by plep on Sep 24, 2004 - 6 comments

posted by plep on Sep 24, 2004 - 6 comments

"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..."

posted by limitedpie on Aug 11, 2004 - 7 comments

posted by limitedpie on Aug 11, 2004 - 7 comments

Cut the Knot. Interactive mathematics miscellany and puzzles.

posted by plep on Jan 6, 2004 - 8 comments

posted by plep on Jan 6, 2004 - 8 comments

Fun with Fibonacci numbers. So you say you scored 130 on yesterday's IQ test, did ya?

posted by archimago on Oct 28, 2003 - 5 comments

posted by archimago on Oct 28, 2003 - 5 comments

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.

posted by Shadowkeeper on May 25, 2001 - 24 comments

posted by Shadowkeeper on May 25, 2001 - 24 comments

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