Logic Puzzles

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POST HERE AND GET BANNED

Last post by aekapaong1 « Tue Sep 18, 2018 8:49 am UTC
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by anfurny » Sat Apr 01, 2017 10:48 pm UTC » in General

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Forum Migration

Last post by Flumble « Mon Nov 27, 2017 1:36 pm UTC
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Attachment(s) by davean » Wed Mar 23, 2016 9:50 am UTC » in School
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xkcd Forum Rules - Updated 6th of Feb, 2017

Last post by hermaj « Fri Nov 07, 2008 4:47 am UTC
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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
Replies: 3
by TheTankengine » Wed Jun 20, 2007 6:38 pm UTC

3 Replies

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Last post by Wildcard View the latest post
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Another smullyanesque puzzle

Last post by quantropy « Tue Mar 08, 2016 7:50 pm UTC
Replies: 14
by Mike Rosoft » Sat Feb 20, 2016 12:20 pm UTC

14 Replies

4135 Views

Last post by quantropy View the latest post
Tue Mar 08, 2016 7:50 pm UTC
Logic puzzles beta testing

Last post by rmsgrey « Tue Mar 08, 2016 4:58 pm UTC
Replies: 4
by GreedyAlgorithm » Sun Mar 06, 2016 8:38 pm UTC

4 Replies

2544 Views

Last post by rmsgrey View the latest post
Tue Mar 08, 2016 4:58 pm UTC
My write-up of the "Blue Eyes" solution (SPOILER A

Last post by BedderDanu « Mon Mar 07, 2016 10:50 pm UTC
Replies: 1368
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by xkcd » Sat Apr 08, 2006 8:26 am UTC
1368 Replies

404665 Views

Last post by BedderDanu View the latest post
Mon Mar 07, 2016 10:50 pm UTC
Two gold nugget puzzle

Last post by douglasm « Mon Mar 07, 2016 5:05 pm UTC
Replies: 17
by DataGenetics » Sun Feb 21, 2016 9:39 am UTC

17 Replies

4746 Views

Last post by douglasm View the latest post
Mon Mar 07, 2016 5:05 pm UTC
Optimize tiling for a 50x50 grid

Last post by Poker « Fri Mar 04, 2016 2:50 pm UTC
Replies: 7
Attachment(s) by Cradarc » Wed Mar 02, 2016 11:14 pm UTC

7 Replies

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Last post by Poker View the latest post
Fri Mar 04, 2016 2:50 pm UTC
Cannot Solve This

Last post by justinrhensen123 « Fri Mar 04, 2016 7:55 am UTC
Replies: 2
by RamiSahoori » Mon Jan 11, 2016 10:08 am UTC

2 Replies

4322 Views

Last post by justinrhensen123 View the latest post
Fri Mar 04, 2016 7:55 am UTC
Simple maths problem?

Last post by justinrhensen123 « Fri Mar 04, 2016 7:43 am UTC
Replies: 9
by vaavapuzzles » Thu Feb 18, 2016 8:01 pm UTC

9 Replies

2816 Views

Last post by justinrhensen123 View the latest post
Fri Mar 04, 2016 7:43 am UTC
Anyone interested in a tough 5-question challenge?

Last post by vaavapuzzles « Wed Mar 02, 2016 9:03 pm UTC
Replies: 27
by vaavapuzzles » Sat Feb 13, 2016 3:45 pm UTC

27 Replies

5720 Views

Last post by vaavapuzzles View the latest post
Wed Mar 02, 2016 9:03 pm UTC
Help Deciphering Cipher With No Spaces

Last post by Quixote « Fri Feb 26, 2016 12:11 am UTC
Replies: 7
by djcoop1 » Wed Oct 07, 2015 3:21 pm UTC

7 Replies

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Last post by Quixote View the latest post
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Russian Roulette with multiple cartridges

Last post by jasondrake « Thu Feb 18, 2016 5:12 pm UTC
Replies: 4
by DataGenetics » Sat Feb 06, 2016 8:35 pm UTC

4 Replies

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Last post by jasondrake View the latest post
Thu Feb 18, 2016 5:12 pm UTC
Blue Eyes with Superrationality

Last post by PTGFlyer « Wed Feb 17, 2016 3:23 pm UTC
Replies: 48
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by flewk » Fri Dec 25, 2015 2:15 pm UTC
48 Replies

9864 Views

Last post by PTGFlyer View the latest post
Wed Feb 17, 2016 3:23 pm UTC
Tractor? I hardly know 'er!

Last post by Jeff_UK « Tue Feb 16, 2016 11:15 am UTC
Replies: 37
by ohthecommotion » Mon Oct 16, 2006 3:54 pm UTC

37 Replies

18069 Views

Last post by Jeff_UK View the latest post
Tue Feb 16, 2016 11:15 am UTC
Six roll dice game

Last post by Jeff_UK « Tue Feb 16, 2016 10:37 am UTC
Replies: 11
by DataGenetics » Thu Feb 04, 2016 9:04 am UTC

11 Replies

3332 Views

Last post by Jeff_UK View the latest post
Tue Feb 16, 2016 10:37 am UTC
Timed Bridge Problem

Last post by jasondrake « Mon Feb 15, 2016 12:42 am UTC
Replies: 5
by jewish_scientist » Wed Oct 07, 2015 4:44 pm UTC

5 Replies

3380 Views

Last post by jasondrake View the latest post
Mon Feb 15, 2016 12:42 am UTC
Unknown Digits

Last post by Cauchy « Mon Feb 15, 2016 12:12 am UTC
Replies: 6
by newbie11 » Thu Feb 11, 2016 1:50 am UTC

6 Replies

2273 Views

Last post by Cauchy View the latest post
Mon Feb 15, 2016 12:12 am UTC
d20 rolling puzzle

Last post by DataGenetics « Sun Feb 14, 2016 4:54 am UTC
Replies: 3
by DataGenetics » Fri Feb 12, 2016 8:44 pm UTC

3 Replies

2233 Views

Last post by DataGenetics View the latest post
Sun Feb 14, 2016 4:54 am UTC
5-uples around a table (hard puzzle)

Last post by Goahead52 « Tue Feb 09, 2016 5:35 pm UTC
Replies: 12
by Goahead52 » Sun Sep 13, 2015 6:27 pm UTC

12 Replies

3979 Views

Last post by Goahead52 View the latest post
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A question about stacking spheres

Last post by jaap « Tue Feb 09, 2016 1:16 pm UTC
Replies: 2
by jaap » Tue Feb 09, 2016 10:36 am UTC

2 Replies

2023 Views

Last post by jaap View the latest post
Tue Feb 09, 2016 1:16 pm UTC
The Lady or the Tiger?

Last post by Mike Rosoft « Sat Feb 06, 2016 9:32 pm UTC
Replies: 9
by Mike Rosoft » Tue Feb 02, 2016 6:52 am UTC

9 Replies

3452 Views

Last post by Mike Rosoft View the latest post
Sat Feb 06, 2016 9:32 pm UTC
The Two Oracles - a statistics problem

Last post by Vytron « Mon Feb 01, 2016 8:53 am UTC
Replies: 74
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by DrZiro » Thu Nov 26, 2015 2:52 pm UTC
74 Replies

11956 Views

Last post by Vytron View the latest post
Mon Feb 01, 2016 8:53 am UTC
Defective Circuit Board Puzzle

Last post by sfwc « Mon Jan 25, 2016 10:56 am UTC
Replies: 7
by DataGenetics » Fri Jan 15, 2016 9:42 pm UTC

7 Replies

2730 Views

Last post by sfwc View the latest post
Mon Jan 25, 2016 10:56 am UTC
Marry the Princess

Last post by chinouii « Tue Jan 19, 2016 9:37 pm UTC

by chinouii » Tue Jan 19, 2016 9:37 pm UTC

0 Replies

3342 Views

Last post by chinouii View the latest post
Tue Jan 19, 2016 9:37 pm UTC
A question about stacking dominoes

Last post by jestingrabbit « Sat Jan 16, 2016 7:19 am UTC
Replies: 5
by jaap » Fri Jan 15, 2016 3:49 pm UTC

5 Replies

2017 Views

Last post by jestingrabbit View the latest post
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Unusual Cake Slicing

Last post by jaap « Fri Jan 15, 2016 5:35 pm UTC
Replies: 84
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Attachment(s) by PaulT » Fri Sep 19, 2008 1:24 pm UTC
84 Replies

18679 Views

Last post by jaap View the latest post
Fri Jan 15, 2016 5:35 pm UTC
Escape the bear in the circle?

Last post by Carmeister « Wed Jan 13, 2016 10:26 pm UTC
Replies: 22
Attachment(s) by mathocean149 » Fri Dec 25, 2015 8:19 am UTC

22 Replies

5370 Views

Last post by Carmeister View the latest post
Wed Jan 13, 2016 10:26 pm UTC
"Shoot for the moon. If you miss, you may hit a star."

Last post by CharlieP « Tue Jan 12, 2016 10:43 am UTC
Replies: 8
by >-) » Mon Oct 26, 2015 5:08 am UTC

8 Replies

4256 Views

Last post by CharlieP View the latest post
Tue Jan 12, 2016 10:43 am UTC
Probability of ending up in room N

Last post by jaap « Thu Dec 31, 2015 6:50 am UTC
Replies: 3
by Moonbeam » Wed Dec 30, 2015 10:00 am UTC

3 Replies

2095 Views

Last post by jaap View the latest post
Thu Dec 31, 2015 6:50 am UTC
Eight by eight matrix, flip a coin.

Last post by Nitrodon « Tue Dec 29, 2015 6:58 am UTC
Replies: 3
by mathocean149 » Mon Dec 28, 2015 11:46 pm UTC

3 Replies

2027 Views

Last post by Nitrodon View the latest post
Tue Dec 29, 2015 6:58 am UTC
World of Darkness 20th Anniversary Probability Function

Last post by BenjCano « Tue Dec 22, 2015 4:58 am UTC

by BenjCano » Tue Dec 22, 2015 4:58 am UTC

0 Replies

2991 Views

Last post by BenjCano View the latest post
Tue Dec 22, 2015 4:58 am UTC
Computing a function without knowing the arguments

Last post by jestingrabbit « Fri Dec 18, 2015 3:10 am UTC
Replies: 6
by >-) » Mon Dec 14, 2015 8:17 pm UTC

6 Replies

2996 Views

Last post by jestingrabbit View the latest post
Fri Dec 18, 2015 3:10 am UTC
Find The Pattern

Last post by jackmcbarn « Thu Dec 17, 2015 1:23 am UTC
Replies: 2
by cavojcon » Thu Oct 15, 2015 1:25 am UTC

2 Replies

2314 Views

Last post by jackmcbarn View the latest post
Thu Dec 17, 2015 1:23 am UTC
Forum Game "Decryption" stalled.

Last post by Quixote « Wed Dec 16, 2015 10:26 pm UTC
Replies: 1
by Feylias » Fri Dec 11, 2015 6:11 pm UTC

1 Replies

2018 Views

Last post by Quixote View the latest post
Wed Dec 16, 2015 10:26 pm UTC
Factorally growing data storage

Last post by mward « Wed Dec 16, 2015 11:41 am UTC
Replies: 3
by undecim » Fri Dec 11, 2015 2:04 pm UTC

3 Replies

2491 Views

Last post by mward View the latest post
Wed Dec 16, 2015 11:41 am UTC
Buffalo buffalo buffalo.

Last post by Sableagle « Sat Nov 28, 2015 12:25 pm UTC
Replies: 58
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by bitwiseshiftleft » Wed Apr 25, 2007 3:29 am UTC
58 Replies

22835 Views

Last post by Sableagle View the latest post
Sat Nov 28, 2015 12:25 pm UTC
Anti-Gambler's Fallacy

Last post by DrZiro « Fri Nov 27, 2015 2:08 am UTC
Replies: 162
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by Cradarc » Mon Sep 07, 2015 10:34 pm UTC
162 Replies

23605 Views

Last post by DrZiro View the latest post
Fri Nov 27, 2015 2:08 am UTC
Find the Mole

Last post by Jeff_UK « Fri Nov 20, 2015 2:00 pm UTC
Replies: 5
by Jeff_UK » Wed Nov 18, 2015 11:54 am UTC

5 Replies

2167 Views

Last post by Jeff_UK View the latest post
Fri Nov 20, 2015 2:00 pm UTC
number pyramid

Last post by Cauchy « Fri Nov 20, 2015 2:27 am UTC
Replies: 1
by rval27 » Wed Nov 18, 2015 9:12 pm UTC

1 Replies

1483 Views

Last post by Cauchy View the latest post
Fri Nov 20, 2015 2:27 am UTC
Request: Most Concise Puzzle you Know

Last post by elasto « Thu Nov 19, 2015 7:24 am UTC
Replies: 1
by Jeff_UK » Mon Nov 16, 2015 11:58 am UTC

1 Replies

1865 Views

Last post by elasto View the latest post
Thu Nov 19, 2015 7:24 am UTC
Kings on a Chessboard

Last post by taemyr « Thu Nov 12, 2015 9:15 am UTC
Replies: 6
by emlightened » Sat Sep 26, 2015 10:21 pm UTC

6 Replies

3113 Views

Last post by taemyr View the latest post
Thu Nov 12, 2015 9:15 am UTC
Timed Bridge Problem

Last post by emlightened « Sat Nov 07, 2015 2:23 am UTC
Replies: 3
by jewish_scientist » Fri Nov 06, 2015 4:34 pm UTC

3 Replies

1902 Views

Last post by emlightened View the latest post
Sat Nov 07, 2015 2:23 am UTC
Squares and sequence

Last post by Goahead52 « Wed Nov 04, 2015 5:52 pm UTC
Replies: 5
by Goahead52 » Sun Nov 01, 2015 3:00 pm UTC

5 Replies

2021 Views

Last post by Goahead52 View the latest post
Wed Nov 04, 2015 5:52 pm UTC
Problem !

Last post by Jeff_UK « Tue Nov 03, 2015 3:25 pm UTC
Replies: 1
by rhino721 » Sun Nov 01, 2015 6:48 pm UTC

1 Replies

1530 Views

Last post by Jeff_UK View the latest post
Tue Nov 03, 2015 3:25 pm UTC
Card Puzzle

Last post by electriczap « Sat Oct 31, 2015 11:09 pm UTC
Replies: 6
Attachment(s) by electriczap » Mon Oct 26, 2015 12:38 am UTC

6 Replies

2404 Views

Last post by electriczap View the latest post
Sat Oct 31, 2015 11:09 pm UTC
Room count of the cross-wired tower.

Last post by Elvish Pillager « Sat Oct 31, 2015 9:48 pm UTC
Replies: 2
by emlightened » Thu Oct 29, 2015 9:45 pm UTC

2 Replies

1752 Views

Last post by Elvish Pillager View the latest post
Sat Oct 31, 2015 9:48 pm UTC
Caesar cipher

Last post by Penitent87 « Tue Oct 20, 2015 10:35 am UTC
Replies: 3
by rhino721 » Fri Oct 02, 2015 9:59 pm UTC

3 Replies

2079 Views

Last post by Penitent87 View the latest post
Tue Oct 20, 2015 10:35 am UTC
Five Birds, Five Doors

Last post by taemyr « Fri Oct 16, 2015 7:51 am UTC
Replies: 1
by Cradarc » Fri Oct 16, 2015 7:05 am UTC

1 Replies

1875 Views

Last post by taemyr View the latest post
Fri Oct 16, 2015 7:51 am UTC
Simplified

Last post by taemyr « Thu Oct 15, 2015 9:40 am UTC
Replies: 5
by rhino721 » Wed Sep 30, 2015 7:57 am UTC

5 Replies

2189 Views

Last post by taemyr View the latest post
Thu Oct 15, 2015 9:40 am UTC
How many rooms are there in the tower?

Last post by Elvish Pillager « Wed Oct 14, 2015 11:41 pm UTC
Replies: 26
by vicariggio » Fri Oct 02, 2015 11:49 am UTC

26 Replies

5224 Views

Last post by Elvish Pillager View the latest post
Wed Oct 14, 2015 11:41 pm UTC
Kirkman's Schoolgirls

Last post by Sandor « Tue Oct 13, 2015 2:56 pm UTC
Replies: 12
by quintopia » Tue Oct 06, 2015 3:32 am UTC

12 Replies

3541 Views

Last post by Sandor View the latest post
Tue Oct 13, 2015 2:56 pm UTC
E2

Last post by mward « Mon Oct 12, 2015 9:04 pm UTC
Replies: 1
by rhino721 » Sun Oct 11, 2015 2:55 pm UTC

1 Replies

1230 Views

Last post by mward View the latest post
Mon Oct 12, 2015 9:04 pm UTC

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