Logic Puzzles

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POST HERE AND GET BANNED

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Forum Migration

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xkcd Forum Rules - Updated 6th of Feb, 2017

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by hermaj » Fri Nov 07, 2008 4:46 am UTC » in School

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Logic Puzzles Rules - Update 2013

Last post by Wildcard « Mon May 25, 2015 8:36 pm UTC
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by TheTankengine » Wed Jun 20, 2007 6:38 pm UTC

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New spoiler policy.

Last post by Soupspoon « Mon Feb 20, 2017 2:53 am UTC
Replies: 39
by jestingrabbit » Mon Oct 01, 2007 8:32 pm UTC

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After You Post A Puzzle, Don't Edit it!

Last post by jestingrabbit « Wed Nov 21, 2012 6:26 pm UTC
Replies: 2
by jestingrabbit » Wed Nov 21, 2012 3:57 pm UTC

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Last post by jestingrabbit View the latest post
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Pirate Game with New Priorities

Last post by Gwydion « Tue Jun 20, 2017 4:55 pm UTC
Replies: 6
by lordofthesnails » Tue Jun 20, 2017 12:38 pm UTC

6 Replies

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Guess the Pattern

Last post by Poker « Sat Jun 17, 2017 7:06 pm UTC
Replies: 21
by jewish_scientist » Mon Jun 05, 2017 7:15 pm UTC

21 Replies

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Optimal Strategy for a new twist on Rock/Paper/Scissors

Last post by timrem « Thu Jun 01, 2017 9:00 pm UTC
Replies: 4
by Cervisiae Amatorem » Thu Jun 01, 2017 8:00 pm UTC

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Two more secrets

Last post by Poker « Sat May 27, 2017 3:33 pm UTC
Replies: 17
by skeptical scientist » Mon Apr 24, 2017 8:29 pm UTC

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MisterGC's PUZZLES

Last post by MisterGC « Fri May 19, 2017 12:26 am UTC
Replies: 17
Attachment(s) by MisterGC » Wed Mar 08, 2017 12:10 am UTC

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A very fiendish one of those "figure out the answer based on logicians not knowing the answer" puzzles

Last post by Poker « Mon Apr 24, 2017 1:56 am UTC
Replies: 8
by Elvish Pillager » Sun Apr 23, 2017 1:50 am UTC

8 Replies

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Last post by Poker View the latest post
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Two secrets

Last post by Yat « Wed Apr 12, 2017 1:12 pm UTC
Replies: 20
by operator[] » Tue Mar 28, 2017 1:34 pm UTC

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Pirate Game - A Variation

Last post by Elvish Pillager « Sun Apr 09, 2017 6:05 pm UTC
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by Poker » Sun Mar 26, 2017 10:58 pm UTC

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Pirate Game - A Variation [solutions]

Last post by sfwc « Thu Apr 06, 2017 7:19 pm UTC

by sfwc » Thu Apr 06, 2017 7:19 pm UTC

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Infinite Balls and Jugs

Last post by Schrödinger's Wolves « Fri Mar 31, 2017 5:02 am UTC
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by mike-l » Thu Sep 17, 2009 6:14 pm UTC

12 Replies

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Last post by Schrödinger's Wolves View the latest post
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Situational Logic Puzzle

Last post by Schrödinger's Wolves « Tue Mar 28, 2017 2:48 pm UTC
Replies: 5
by panos567 » Mon Mar 20, 2017 2:37 pm UTC

5 Replies

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Pirate's Dilemna

Last post by djangochained « Tue Mar 28, 2017 1:25 pm UTC
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by heuristically_alone » Mon Oct 03, 2016 6:58 am UTC

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Escape the Frictionless Circle

Last post by Sizik « Sat Mar 04, 2017 12:05 am UTC
Replies: 136
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Attachment(s) by Cradarc » Fri Nov 06, 2015 6:19 am UTC
136 Replies

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Last post by Sizik View the latest post
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A Fun Math Puzzle

Last post by SecondTalon « Mon Feb 27, 2017 1:52 pm UTC
Replies: 2
Attachment(s) by Bane Harper » Mon Feb 27, 2017 7:17 am UTC

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Last post by SecondTalon View the latest post
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Stock Redistribution

Last post by Jeff_UK « Tue Feb 14, 2017 1:24 pm UTC
Replies: 10
by Micklebring » Fri Dec 02, 2016 5:35 pm UTC

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Puzzle : Catch Mickey

Last post by Goahead52 « Wed Feb 08, 2017 7:20 pm UTC
Replies: 6
Attachment(s) by Goahead52 » Sun Feb 05, 2017 7:11 pm UTC

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An unusual resolution of the liar's paradox.

Last post by teleh « Thu Feb 02, 2017 7:14 am UTC
Replies: 26
by skeptical scientist » Tue Mar 13, 2007 6:57 am UTC

26 Replies

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Last post by teleh View the latest post
Thu Feb 02, 2017 7:14 am UTC
Paper and Pencil Game Puzzle

Last post by Shufflepants « Thu Jan 26, 2017 7:26 pm UTC
Replies: 5
by ErinPickle » Wed Dec 28, 2016 11:10 pm UTC

5 Replies

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Last post by Shufflepants View the latest post
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New puzzle : Equalize

Last post by Goahead52 « Tue Jan 24, 2017 2:14 pm UTC
Replies: 13
Attachment(s) by Goahead52 » Tue Jan 17, 2017 5:10 pm UTC

13 Replies

1941 Views

Last post by Goahead52 View the latest post
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magic cube

Last post by Demki « Mon Jan 09, 2017 9:05 pm UTC
Replies: 4
by MCNP2010 » Mon Jan 09, 2017 4:45 pm UTC

4 Replies

1160 Views

Last post by Demki View the latest post
Mon Jan 09, 2017 9:05 pm UTC
Infinite Balls and Jugs [solution]

Last post by mward « Thu Jan 05, 2017 9:03 pm UTC
Replies: 611
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by Bravemuta » Thu Sep 17, 2009 9:37 pm UTC
611 Replies

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Last post by mward View the latest post
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Riddle

Last post by Fume Troll « Thu Jan 05, 2017 1:31 pm UTC
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by Rokkuri » Sat Oct 22, 2016 4:55 pm UTC

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Maximizing Targeted Return

Last post by MRR « Wed Jan 04, 2017 1:02 pm UTC
Replies: 5
by MRR » Wed Dec 28, 2016 2:24 pm UTC

5 Replies

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Word Puzzle.

Last post by Poker « Fri Dec 16, 2016 3:35 pm UTC
Replies: 6
by stopmadnessnow » Tue Dec 13, 2016 4:17 pm UTC

6 Replies

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Hidden Cards

Last post by Xias « Sat Nov 26, 2016 9:06 am UTC
Replies: 5
by Cradarc » Sat Nov 19, 2016 3:17 am UTC

5 Replies

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Last post by Xias View the latest post
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Lost Car Keys

Last post by Cauchy « Thu Nov 17, 2016 7:48 pm UTC
Replies: 1
by DataGenetics » Thu Nov 17, 2016 7:27 pm UTC

1 Replies

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Last post by Cauchy View the latest post
Thu Nov 17, 2016 7:48 pm UTC
Forum Zendo [intra-xkcd-forum link]

Last post by Fieari « Tue Nov 01, 2016 7:27 am UTC

by Fieari » Tue Nov 01, 2016 7:27 am UTC

0 Replies

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Last post by Fieari View the latest post
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Can't solve this simple puzzle. Help ?

Last post by lorb « Sat Oct 22, 2016 7:26 pm UTC
Replies: 1
by DoozKO » Thu Oct 13, 2016 11:04 pm UTC

1 Replies

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Last post by lorb View the latest post
Sat Oct 22, 2016 7:26 pm UTC
Solitaire game

Last post by Goahead52 « Wed Oct 19, 2016 3:01 pm UTC
Replies: 4
by Goahead52 » Tue Oct 11, 2016 2:58 pm UTC

4 Replies

1803 Views

Last post by Goahead52 View the latest post
Wed Oct 19, 2016 3:01 pm UTC
Maya Cosmic Number Puzzles

Last post by generalz « Wed Oct 12, 2016 3:42 pm UTC
Replies: 5
by MCNP2010 » Tue Oct 04, 2016 4:38 pm UTC

5 Replies

2052 Views

Last post by generalz View the latest post
Wed Oct 12, 2016 3:42 pm UTC
Cat and mouse v.2

Last post by lexolf « Mon Sep 19, 2016 6:24 am UTC
Replies: 2
by lexolf » Sun Sep 18, 2016 6:58 am UTC

2 Replies

1788 Views

Last post by lexolf View the latest post
Mon Sep 19, 2016 6:24 am UTC
Connect all points to form a single tree

Last post by paramesis « Thu Sep 15, 2016 9:12 pm UTC
Replies: 12
Attachment(s) by paramesis » Thu Aug 11, 2016 7:50 pm UTC

12 Replies

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Last post by paramesis View the latest post
Thu Sep 15, 2016 9:12 pm UTC
Logic Puzzles - Admittedly, not naturally equipped to solve them...

Last post by ThirdParty « Sat Aug 27, 2016 4:10 pm UTC
Replies: 17
by Snarlock » Wed Jul 27, 2016 2:44 pm UTC

17 Replies

4131 Views

Last post by ThirdParty View the latest post
Sat Aug 27, 2016 4:10 pm UTC
Factorial puzzle

Last post by Cauchy « Mon Aug 22, 2016 2:22 pm UTC
Replies: 6
by Goahead52 » Tue Aug 16, 2016 7:04 pm UTC

6 Replies

2096 Views

Last post by Cauchy View the latest post
Mon Aug 22, 2016 2:22 pm UTC
Sharing secret information publicly

Last post by Goahead52 « Tue Aug 16, 2016 12:16 pm UTC
Replies: 27
by DataGenetics » Mon Aug 08, 2016 4:44 pm UTC

27 Replies

3413 Views

Last post by Goahead52 View the latest post
Tue Aug 16, 2016 12:16 pm UTC
Puzzle about odd semi-primes and Euler totient

Last post by Goahead52 « Sun Aug 07, 2016 9:06 pm UTC
Replies: 8
by Goahead52 » Thu Aug 04, 2016 6:19 pm UTC

8 Replies

2015 Views

Last post by Goahead52 View the latest post
Sun Aug 07, 2016 9:06 pm UTC
Puzzle game I built

Last post by jaap « Sat Aug 06, 2016 10:59 pm UTC
Replies: 1
by mapehe » Sat Aug 06, 2016 9:15 am UTC

1 Replies

1754 Views

Last post by jaap View the latest post
Sat Aug 06, 2016 10:59 pm UTC
The Locker Puzzle

Last post by Sandor « Fri Aug 05, 2016 10:45 am UTC
Replies: 5
by rlo » Wed Oct 04, 2006 12:31 pm UTC

5 Replies

8195 Views

Last post by Sandor View the latest post
Fri Aug 05, 2016 10:45 am UTC
Jenga

Last post by Soupspoon « Thu Aug 04, 2016 7:17 pm UTC
Replies: 7
by LaserGuy » Fri Jul 29, 2016 6:22 pm UTC

7 Replies

2310 Views

Last post by Soupspoon View the latest post
Thu Aug 04, 2016 7:17 pm UTC
Unblock puzzle with pipes

Last post by ProDext « Thu Aug 04, 2016 2:12 pm UTC
Replies: 6
by ProDext » Sat Jul 30, 2016 3:18 pm UTC

6 Replies

2256 Views

Last post by ProDext View the latest post
Thu Aug 04, 2016 2:12 pm UTC
Move one stick

Last post by HonoreDB « Fri Jul 29, 2016 6:24 pm UTC
Replies: 5
by SirGabriel » Wed Jul 27, 2016 4:24 pm UTC

5 Replies

2149 Views

Last post by HonoreDB View the latest post
Fri Jul 29, 2016 6:24 pm UTC
Help with picture puzzle please .....

Last post by Soupspoon « Tue Jul 26, 2016 9:23 pm UTC
Replies: 3
by Moonbeam » Tue Jul 26, 2016 8:10 pm UTC

3 Replies

2472 Views

Last post by Soupspoon View the latest post
Tue Jul 26, 2016 9:23 pm UTC
Two puzzles for the price of 1!

Last post by Trebla « Tue Jul 26, 2016 4:21 pm UTC
Replies: 17
by LjSpike » Tue Jun 21, 2016 8:17 pm UTC

17 Replies

3624 Views

Last post by Trebla View the latest post
Tue Jul 26, 2016 4:21 pm UTC
Monty Hall-ish Problem

Last post by mward « Tue Jul 19, 2016 2:59 pm UTC
Replies: 4
by Cradarc » Fri Jul 15, 2016 5:52 am UTC

4 Replies

2206 Views

Last post by mward View the latest post
Tue Jul 19, 2016 2:59 pm UTC
Logic Puzzle - Scavenger Hunt

Last post by Markus__1 « Sun Jul 10, 2016 11:44 pm UTC
Replies: 9
by Alex Shultz » Thu Jun 23, 2016 7:29 am UTC

9 Replies

3657 Views

Last post by Markus__1 View the latest post
Sun Jul 10, 2016 11:44 pm UTC
Six axis logic grid puzzle

Last post by paramesis « Thu Jul 07, 2016 1:40 pm UTC
Replies: 3
by paramesis » Thu Jun 23, 2016 6:01 pm UTC

3 Replies

2729 Views

Last post by paramesis View the latest post
Thu Jul 07, 2016 1:40 pm UTC
Beautiful Puzzle I just remembered...

Last post by LjSpike « Sat Jun 25, 2016 7:58 am UTC
Replies: 2
by LjSpike » Fri Jun 24, 2016 2:41 pm UTC

2 Replies

2587 Views

Last post by LjSpike View the latest post
Sat Jun 25, 2016 7:58 am UTC
Seeking Advise from Puzzle Masters

Last post by Cauchy « Fri Jun 24, 2016 11:49 pm UTC
Replies: 20
Attachment(s) by PadreMontoya » Wed Jun 22, 2016 2:35 am UTC

20 Replies

3259 Views

Last post by Cauchy View the latest post
Fri Jun 24, 2016 11:49 pm UTC

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