Logic Puzzles
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- xkcd Forum Rules - Updated Nov. 13th 2012
by hermaj » Fri Nov 07, 2008 4:46 am UTC - 1 Replies
- 363323 Views
- Last post by hermaj
Fri Nov 07, 2008 4:47 am UTC
- xkcd Forum Rules - Updated Nov. 13th 2012
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- Logic Puzzles Rules - Update 2013
by TheTankengine » Wed Jun 20, 2007 6:38 pm UTC - 0 Replies
- 15704 Views
- Last post by TheTankengine
Wed Jun 20, 2007 6:38 pm UTC
- Logic Puzzles Rules - Update 2013
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- Topics
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- After You Post A Puzzle, Don't Edit it!
by jestingrabbit » Wed Nov 21, 2012 3:57 pm UTC - 2 Replies
- 6579 Views
- Last post by jestingrabbit
Wed Nov 21, 2012 6:26 pm UTC
- After You Post A Puzzle, Don't Edit it!
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- New spoiler policy.
by jestingrabbit » Mon Oct 01, 2007 8:32 pm UTC - 35 Replies
- 40751 Views
- Last post by MasterOfAll
Thu Nov 01, 2012 3:45 pm UTC
- New spoiler policy.
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- Lottery Ticket ................
by Moonbeam » Thu Jul 03, 2014 2:23 pm UTC - 9 Replies
- 747 Views
- Last post by ToastOfDestiny
Sat Jul 26, 2014 8:47 am UTC
- Lottery Ticket ................
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- One Question Quiz
by gearce » Fri Jun 06, 2014 5:52 am UTC - 7 Replies
- 1116 Views
- Last post by Trebla
Thu Jul 24, 2014 2:27 pm UTC
- One Question Quiz
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- Fake shoes
by ineedhelp » Mon Jun 30, 2014 8:38 pm UTC - 5 Replies
- 828 Views
- Last post by Xias
Thu Jul 24, 2014 6:01 am UTC
- Fake shoes
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- Non-transitive dice
by tomtom2357 » Sun Sep 29, 2013 3:39 pm UTC - 9 Replies
- 3278 Views
- Last post by ExplodingCactus
Thu Jul 17, 2014 11:55 pm UTC
- Non-transitive dice
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- Three Logs Puzzle
by robertcorner » Sat Jul 05, 2014 11:08 am UTC - 1 Replies
- 482 Views
- Last post by gmgm
Wed Jul 09, 2014 2:22 pm UTC
- Three Logs Puzzle
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- Grid 4 by 4 with numbers and letters
by gmgm » Wed Jul 02, 2014 3:02 pm UTC - 2 Replies
- 477 Views
- Last post by Cauchy
Fri Jul 04, 2014 9:41 am UTC
- Grid 4 by 4 with numbers and letters
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- Illustrated Math Function
by Bloopy » Fri Jun 27, 2014 1:45 pm UTC - 0 Replies
- 523 Views
- Last post by Bloopy
Fri Jun 27, 2014 1:45 pm UTC
- Illustrated Math Function
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- Hard number sequence: 4, 8, 16, 26, 41, 57, 79, 104, 138,...
by gmgm » Fri Jun 20, 2014 6:34 pm UTC - 4 Replies
- 836 Views
- Last post by jestingrabbit
Thu Jun 26, 2014 7:08 pm UTC
- Hard number sequence: 4, 8, 16, 26, 41, 57, 79, 104, 138,...
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- Two interesting puzzles (1 easy, 1 unsolved)
by gmgm » Tue Jun 24, 2014 11:54 pm UTC
- 4 Replies
- 677 Views
- Last post by gmgm
Thu Jun 26, 2014 1:03 am UTC
- Two interesting puzzles (1 easy, 1 unsolved)
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- Two interesting puzzles (1 easy, 1 unsolved)[Solutions,etc.]
by gmgm » Wed Jun 25, 2014 8:30 am UTC - 1 Replies
- 452 Views
- Last post by gmgm
Wed Jun 25, 2014 8:39 am UTC
- Two interesting puzzles (1 easy, 1 unsolved)[Solutions,etc.]
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- Meta-Puzzles
by Carmeister » Wed Jun 04, 2014 2:34 am UTC
- 6 Replies
- 881 Views
- Last post by jazzman616
Sat Jun 21, 2014 1:16 am UTC
- Meta-Puzzles
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- Good at solving Cryptic Clues?
by gearce » Thu Jun 05, 2014 4:17 am UTC - 15 Replies
- 1449 Views
- Last post by gearce
Sat Jun 14, 2014 1:04 am UTC
- Good at solving Cryptic Clues?
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- Movie Buffs Associated Week of Films - Logic Grid Puzzles
by gearce » Fri Jun 06, 2014 5:38 am UTC
- 4 Replies
- 599 Views
- Last post by gearce
Fri Jun 13, 2014 4:37 am UTC
- Movie Buffs Associated Week of Films - Logic Grid Puzzles
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- Cipher Puzzles
by gearce » Tue Jun 10, 2014 5:59 am UTC
- 0 Replies
- 358 Views
- Last post by gearce
Tue Jun 10, 2014 5:59 am UTC
- Cipher Puzzles
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- Try to solve my online puzzle game
by MasterYodan » Mon Jun 09, 2014 9:49 pm UTC - 0 Replies
- 421 Views
- Last post by MasterYodan
Mon Jun 09, 2014 9:49 pm UTC
- Try to solve my online puzzle game
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- The Blindfolded Poem and the Left Arrow Key
by Lopsidation » Thu May 01, 2014 11:19 pm UTC - 14 Replies
- 2907 Views
- Last post by jedelmania
Wed Jun 04, 2014 11:27 am UTC
- The Blindfolded Poem and the Left Arrow Key
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- List of Good Puzzles
by Peterotooled » Thu May 29, 2014 6:53 am UTC - 0 Replies
- 982 Views
- Last post by Peterotooled
Thu May 29, 2014 6:53 am UTC
- List of Good Puzzles
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- riddle- the restaurant
by ryefield » Wed Apr 23, 2014 7:55 am UTC - 3 Replies
- 1477 Views
- Last post by onoresrts63
Fri May 23, 2014 5:00 am UTC
- riddle- the restaurant
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- Please test an online puzzle game (based on Brainf**k)
by lorb » Mon Apr 07, 2014 3:26 pm UTC
- 18 Replies
- 2099 Views
- Last post by mike-l
Fri May 02, 2014 11:27 pm UTC
- Please test an online puzzle game (based on Brainf**k)
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- Guess The Hashing Algorithm
by ircmaxell » Mon Apr 28, 2014 11:02 pm UTC - 0 Replies
- 776 Views
- Last post by ircmaxell
Mon Apr 28, 2014 11:02 pm UTC
- Guess The Hashing Algorithm
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- If Godzilla existed... could the Earth support it
by Finaltheory » Mon Apr 21, 2014 6:16 am UTC - 22 Replies
- 2841 Views
- Last post by mathmannix
Mon Jul 14, 2014 8:32 pm UTC
- If Godzilla existed... could the Earth support it
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- Decrypt Cyphertext
by katinkakun » Wed Apr 16, 2014 8:58 pm UTC - 1 Replies
- 807 Views
- Last post by Lopsidation
Fri Apr 18, 2014 3:19 pm UTC
- Decrypt Cyphertext
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- A very unconventional solution to the world’s most difficult
by Santa-Klaus » Thu Mar 27, 2014 1:52 am UTC - 27 Replies
- 3460 Views
- Last post by Who
Sat Apr 12, 2014 2:54 am UTC
- A very unconventional solution to the world’s most difficult
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- Infinite noughts and crosses
by snowyowl » Fri Apr 04, 2014 10:11 pm UTC - 3 Replies
- 1281 Views
- Last post by Nitrodon
Sat Apr 05, 2014 7:24 pm UTC
- Infinite noughts and crosses
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- Coded Image
by Rhombic » Mon Jan 13, 2014 9:02 pm UTC
- 6 Replies
- 2040 Views
- Last post by elasto
Sun Mar 30, 2014 12:23 pm UTC
- Coded Image
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- Number substitution puzzle - multiplication
by Demki » Sat Mar 01, 2014 1:41 pm UTC
- 21 Replies
- 2818 Views
- Last post by Xias
Thu Mar 27, 2014 8:44 am UTC
- Number substitution puzzle - multiplication
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- The ambiguous clock
by snowyowl » Wed Mar 19, 2014 12:27 pm UTC - 4 Replies
- 1622 Views
- Last post by orbik
Wed Mar 26, 2014 9:25 pm UTC
- The ambiguous clock
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- Playing 3D Tetris puzzle by interpreting 2D projections
by bs_observer » Sun Mar 23, 2014 10:23 am UTC - 2 Replies
- 1046 Views
- Last post by bs_observer
Tue Mar 25, 2014 3:47 am UTC
- Playing 3D Tetris puzzle by interpreting 2D projections
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- Mother of All Puzzles
1, 2, 3by GeoffreyY » Fri Mar 08, 2013 12:14 pm UTC - 91 Replies
- 26945 Views
- Last post by Carmeister
Wed Mar 19, 2014 1:52 am UTC
- Mother of All Puzzles
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- Riddling: a puzzle game you all might like
by aquarius » Wed Mar 12, 2014 11:53 pm UTC - 2 Replies
- 1468 Views
- Last post by aquarius
Sat Mar 15, 2014 11:35 am UTC
- Riddling: a puzzle game you all might like
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- Interpret this sequence 1893 900 5 1040 ...
by xkcud » Mon Oct 10, 2011 5:46 am UTC - 14 Replies
- 4948 Views
- Last post by PsiSquared
Fri Mar 14, 2014 1:01 am UTC
- Interpret this sequence 1893 900 5 1040 ...
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- The philosopher, the most intelligent man and the fish
1, 2by Rhombic » Sat Jan 18, 2014 9:31 pm UTC - 44 Replies
- 6201 Views
- Last post by BigNose
Mon Mar 10, 2014 2:17 pm UTC
- The philosopher, the most intelligent man and the fish
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- Find the final answer
by lamora92 » Thu Feb 27, 2014 6:40 am UTC - 9 Replies
- 1805 Views
- Last post by thefargo
Fri Mar 07, 2014 8:32 pm UTC
- Find the final answer
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- The Hardest Logic Puzzle Ever
by KnightExemplar » Mon Mar 03, 2014 3:50 am UTC - 3 Replies
- 1646 Views
- Last post by Qaanol
Tue Mar 04, 2014 10:06 pm UTC
- The Hardest Logic Puzzle Ever
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- the poisoned wine
by phillip1882 » Wed Jan 29, 2014 3:21 am UTC - 27 Replies
- 3554 Views
- Last post by checkmate
Wed Feb 26, 2014 11:40 pm UTC
- the poisoned wine
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- The Waiter
by Thantsking » Mon Feb 24, 2014 4:00 am UTC - 2 Replies
- 1481 Views
- Last post by jestingrabbit
Tue Feb 25, 2014 7:13 am UTC
- The Waiter
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- Find a set of numbers containing mine
by wraith » Fri Dec 06, 2013 12:37 pm UTC - 32 Replies
- 5319 Views
- Last post by wraith
Wed Feb 19, 2014 1:49 pm UTC
- Find a set of numbers containing mine
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- Crack the code
by maxpotier » Tue Dec 03, 2013 9:30 pm UTC - 2 Replies
- 2221 Views
- Last post by Frankz
Fri Feb 14, 2014 2:56 am UTC
- Crack the code
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- My write-up of the "Blue Eyes" solution (SPOILER A
1 ... 27, 28, 29by xkcd » Sat Apr 08, 2006 8:26 am UTC - 1152 Replies
- 248129 Views
- Last post by Lunch Meat
Tue Feb 11, 2014 8:37 pm UTC
- My write-up of the "Blue Eyes" solution (SPOILER A
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- Rotating Pieces: Solve My Game!
by krazykate » Tue Feb 04, 2014 3:46 pm UTC
- 12 Replies
- 1822 Views
- Last post by PeteP
Mon Feb 10, 2014 5:29 pm UTC
- Rotating Pieces: Solve My Game!
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- Prisoners disguised as guards
by wraith » Mon Oct 28, 2013 1:59 pm UTC - 29 Replies
- 4789 Views
- Last post by operator[]
Fri Jan 31, 2014 9:55 pm UTC
- Prisoners disguised as guards
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- The Coin Codes
by Rhombic » Sun Jan 05, 2014 10:06 pm UTC - 3 Replies
- 1794 Views
- Last post by jestingrabbit
Mon Jan 06, 2014 2:02 pm UTC
- The Coin Codes
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- Sum of three cards game
by wraith » Fri Dec 20, 2013 12:59 pm UTC - 6 Replies
- 3076 Views
- Last post by CharlieP
Thu Jan 02, 2014 11:44 am UTC
- Sum of three cards game
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- Three princesses
1 ... 9, 10, 11by Fleshpiston » Fri Jul 14, 2006 8:25 am UTC - 408 Replies
- 135747 Views
- Last post by firefly
Wed Dec 18, 2013 8:16 am UTC
- Three princesses
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- Flipping 50 consecutive cards
by wraith » Mon Dec 09, 2013 12:05 pm UTC - 15 Replies
- 3272 Views
- Last post by jedelmania
Thu Dec 12, 2013 10:29 am UTC
- Flipping 50 consecutive cards
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- Misplaced Christmas presents
by wraith » Wed Nov 27, 2013 12:50 pm UTC - 11 Replies
- 3431 Views
- Last post by tomtom2357
Sun Dec 01, 2013 12:42 pm UTC
- Misplaced Christmas presents
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