Logic Puzzles

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POST HERE AND GET BANNED

Last post by nmonnmo01 « Mon Jun 10, 2019 10:21 am UTC
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by anfurny » Sat Apr 01, 2017 10:48 pm UTC » in General
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Forum Migration

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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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Cipher Puzzle

Last post by gearce « Sun May 29, 2016 11:07 pm UTC
Replies: 2
Attachment(s) by gearce » Sat May 28, 2016 11:56 pm UTC

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Last post by gearce View the latest post
Sun May 29, 2016 11:07 pm UTC
Logic Grid Puzzle - Cricket SOLUTION

Last post by gearce « Sat May 28, 2016 5:29 am UTC
Replies: 2
Attachment(s) by gearce » Sat May 28, 2016 3:40 am UTC

2 Replies

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Last post by gearce View the latest post
Sat May 28, 2016 5:29 am UTC
Logic Grid Puzzle - Cricket -SOLVED

Last post by gearce « Sat May 28, 2016 3:37 am UTC

Attachment(s) by gearce » Sat May 28, 2016 3:37 am UTC

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Last post by gearce View the latest post
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Open puzzle about game

Last post by curiosityspoon « Thu May 26, 2016 10:51 pm UTC
Replies: 36
by Goahead52 » Sat May 21, 2016 10:55 pm UTC

36 Replies

7414 Views

Last post by curiosityspoon View the latest post
Thu May 26, 2016 10:51 pm UTC
JavaScript chaining challenge

Last post by operator[] « Fri May 20, 2016 8:11 pm UTC
Replies: 6
by The Snide Sniper » Wed May 18, 2016 2:35 am UTC

6 Replies

3610 Views

Last post by operator[] View the latest post
Fri May 20, 2016 8:11 pm UTC
What is the last number (alphabetically)?

Last post by Beavertails « Fri May 20, 2016 2:41 pm UTC
Replies: 12
by stopmadnessnow » Sat May 07, 2016 6:08 am UTC

12 Replies

5125 Views

Last post by Beavertails View the latest post
Fri May 20, 2016 2:41 pm UTC
An annoying "riddle" I wanted to share

Last post by Sableagle « Sat May 14, 2016 11:04 am UTC
Replies: 12
by SPACKlick » Mon Sep 14, 2015 3:24 pm UTC

12 Replies

7298 Views

Last post by Sableagle View the latest post
Sat May 14, 2016 11:04 am UTC
Logic Grid Puzzle!

Last post by patzer « Wed May 04, 2016 4:52 pm UTC
Replies: 2
Attachment(s) by Top1 » Tue May 03, 2016 1:44 am UTC

2 Replies

2848 Views

Last post by patzer View the latest post
Wed May 04, 2016 4:52 pm UTC
Pennies in Boxes

Last post by DanD « Tue May 03, 2016 3:59 pm UTC
Replies: 85
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by undecim » Thu Sep 06, 2012 10:06 pm UTC
85 Replies

51760 Views

Last post by DanD View the latest post
Tue May 03, 2016 3:59 pm UTC
Baseball card collecting

Last post by undecim « Sat Apr 30, 2016 3:30 pm UTC
Replies: 3
by DataGenetics » Fri Apr 29, 2016 4:50 pm UTC

3 Replies

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Last post by undecim View the latest post
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Difficult chemical equation

Last post by gmalivuk « Thu Apr 21, 2016 4:54 pm UTC
Replies: 11
by The Snide Sniper » Mon Mar 21, 2016 7:51 pm UTC

11 Replies

9082 Views

Last post by gmalivuk View the latest post
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Tricky geometric proof

Last post by Wildcard « Sat Apr 16, 2016 3:21 am UTC
Replies: 8
Attachment(s) by Wildcard » Wed May 20, 2015 8:18 am UTC

8 Replies

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Last post by Wildcard View the latest post
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Can you solve this?

Last post by DanD « Fri Apr 15, 2016 8:31 pm UTC
Replies: 3
by someoneodd » Sun Apr 26, 2015 11:57 pm UTC

3 Replies

4363 Views

Last post by DanD View the latest post
Fri Apr 15, 2016 8:31 pm UTC
Who can solve this???

Last post by lorb « Fri Apr 08, 2016 11:20 am UTC
Replies: 2
by edwinthegreat » Fri Apr 01, 2016 11:43 am UTC

2 Replies

3068 Views

Last post by lorb View the latest post
Fri Apr 08, 2016 11:20 am UTC
Drawing Two Bingo Balls

Last post by ThirdParty « Sat Apr 02, 2016 9:19 pm UTC
Replies: 3
by DataGenetics » Fri Apr 01, 2016 2:54 pm UTC

3 Replies

3191 Views

Last post by ThirdParty View the latest post
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Captain Forever: URL decryption

Last post by liberonscien « Fri Apr 01, 2016 5:46 am UTC
Replies: 24
by Weeks » Thu Jan 21, 2010 10:12 pm UTC

24 Replies

25254 Views

Last post by liberonscien View the latest post
Fri Apr 01, 2016 5:46 am UTC
THIS IS A CHALLENGE FOR INTELLIGENT BRAINS

Last post by Demki « Wed Mar 30, 2016 5:21 pm UTC
Replies: 4
by iavinash » Sat Feb 06, 2016 11:16 am UTC

4 Replies

4607 Views

Last post by Demki View the latest post
Wed Mar 30, 2016 5:21 pm UTC
How many prisoners?

Last post by tomtom2357 « Sun Mar 20, 2016 3:07 am UTC
Replies: 112
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by sfwc » Mon Apr 25, 2011 12:21 pm UTC
112 Replies

46323 Views

Last post by tomtom2357 View the latest post
Sun Mar 20, 2016 3:07 am UTC
Three princesses

Last post by douglasm « Wed Mar 16, 2016 7:29 am UTC
Replies: 446
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by Fleshpiston » Fri Jul 14, 2006 8:25 am UTC
446 Replies

204201 Views

Last post by douglasm View the latest post
Wed Mar 16, 2016 7:29 am UTC
Three Water Tanks

Last post by curiosityspoon « Fri Mar 11, 2016 8:05 am UTC
Replies: 7
by Cradarc » Wed Mar 09, 2016 8:57 pm UTC

7 Replies

3687 Views

Last post by curiosityspoon View the latest post
Fri Mar 11, 2016 8:05 am UTC
Prime mumber distribution ......

Last post by Moonbeam « Wed Mar 09, 2016 7:58 pm UTC
Replies: 2
by Moonbeam » Wed Mar 09, 2016 6:13 pm UTC

2 Replies

2732 Views

Last post by Moonbeam View the latest post
Wed Mar 09, 2016 7:58 pm UTC
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

4451 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

2772 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

418705 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

5233 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

3604 Views

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

4524 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

3172 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

6116 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

6458 Views

Last post by Quixote View the latest post
Fri Feb 26, 2016 12:11 am UTC
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

3127 Views

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

10612 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

18762 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

3615 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

3660 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

2443 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

2390 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

4230 Views

Last post by Goahead52 View the latest post
Tue Feb 09, 2016 5:35 pm UTC
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

2167 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

3955 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

13632 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

3003 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

3754 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

2212 Views

Last post by jestingrabbit View the latest post
Sat Jan 16, 2016 7:19 am UTC
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

20222 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

6093 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

4668 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

2331 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

2215 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

3464 Views

Last post by BenjCano View the latest post
Tue Dec 22, 2015 4:58 am UTC

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