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
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- Last post by hermaj
Fri Nov 07, 2008 4:47 am UTC
- xkcd Forum Rules - Updated Nov. 13th 2012
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- Rules - Update Aug 23
by TheTankengine » Wed Jun 20, 2007 6:38 pm UTC - 0 Replies
- 12222 Views
- Last post by TheTankengine
Wed Jun 20, 2007 6:38 pm UTC
- Rules - Update Aug 23
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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
- 1778 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
- 31952 Views
- Last post by MasterOfAll
Thu Nov 01, 2012 3:45 pm UTC
- New spoiler policy.
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- My Hobby: Steganography
by ThirdParty » Mon May 20, 2013 2:54 pm UTC - 10 Replies
- 293 Views
- Last post by ThirdParty
Wed May 22, 2013 12:03 am UTC
- My Hobby: Steganography
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- Pyramid stacking of balls
by arcanmster » Tue May 21, 2013 7:56 pm UTC - 1 Replies
- 66 Views
- Last post by dudiobugtron
Tue May 21, 2013 9:05 pm UTC
- Pyramid stacking of balls
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- Team challenge
by Matthijsss » Wed May 08, 2013 3:40 pm UTC - 18 Replies
- 995 Views
- Last post by jestingrabbit
Tue May 21, 2013 5:13 pm UTC
- Team challenge
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- Mother of All Puzzles
1, 2by GeoffreyY » Fri Mar 08, 2013 12:14 pm UTC - 68 Replies
- 7482 Views
- Last post by SerialTroll
Tue May 21, 2013 1:12 pm UTC
- Mother of All Puzzles
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- Can you crack my code? Version two
by Jumper_0 » Sun Apr 21, 2013 5:23 am UTC - 9 Replies
- 652 Views
- Last post by Jumper_0
Tue May 21, 2013 10:08 am UTC
- Can you crack my code? Version two
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- The Curious Case of the Really Shitty Cryptogram
by thecamoninja » Wed May 15, 2013 11:32 pm UTC
- 7 Replies
- 786 Views
- Last post by ThirdParty
Sun May 19, 2013 4:45 am UTC
- The Curious Case of the Really Shitty Cryptogram
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- Traditional Logic Puzzle Game
by duwease » Thu May 16, 2013 8:12 pm UTC - 2 Replies
- 363 Views
- Last post by duwease
Thu May 16, 2013 10:44 pm UTC
- Traditional Logic Puzzle Game
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- The truthteller and the politician
1, 2by liveboy21 » Fri Dec 28, 2012 12:22 pm UTC - 65 Replies
- 9671 Views
- Last post by Asthanius
Mon May 13, 2013 2:27 pm UTC
- The truthteller and the politician
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- What is s?
by jimmetry » Fri May 10, 2013 7:51 pm UTC - 3 Replies
- 465 Views
- Last post by Demki
Mon May 13, 2013 4:17 am UTC
- What is s?
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- "Projectors" and other Math Puzzles by Vlad Mitlin
by dudiobugtron » Tue May 07, 2013 1:26 am UTC - 14 Replies
- 705 Views
- Last post by dudiobugtron
Fri May 10, 2013 5:22 pm UTC
- "Projectors" and other Math Puzzles by Vlad Mitlin
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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 - 1128 Replies
- 191677 Views
- Last post by dudiobugtron
Fri May 10, 2013 12:06 am UTC
- My write-up of the "Blue Eyes" solution (SPOILER A
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- A meta-riddle?
by alessandro95 » Thu Apr 25, 2013 8:09 am UTC - 39 Replies
- 1526 Views
- Last post by ALFERALFER
Tue Apr 30, 2013 9:21 pm UTC
- A meta-riddle?
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- Flow
by krazykate » Tue Jan 22, 2013 1:39 am UTC
- 16 Replies
- 5410 Views
- Last post by KrazyerKate
Sun Apr 28, 2013 2:59 pm UTC
- Flow
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- A very interesting Mathematical Paradox
1 ... 8, 9, 10by sabbathxxl » Mon Sep 25, 2006 1:07 am UTC - 387 Replies
- 84382 Views
- Last post by DeGuerre
Fri Apr 26, 2013 12:05 am UTC
- A very interesting Mathematical Paradox
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- Pennies in Boxes
1, 2by undecim » Thu Sep 06, 2012 10:06 pm UTC - 70 Replies
- 11856 Views
- Last post by vvn
Sat Apr 20, 2013 3:37 am UTC
- Pennies in Boxes
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- A formula to work out a logic puzzle
by jimnastics » Wed Mar 13, 2013 12:52 pm UTC - 20 Replies
- 3150 Views
- Last post by tomtom2357
Tue Apr 16, 2013 12:29 pm UTC
- A formula to work out a logic puzzle
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- IRC channel for puzzle-lovers
by zachbarnett » Sat Apr 13, 2013 7:42 pm UTC - 0 Replies
- 611 Views
- Last post by zachbarnett
Sat Apr 13, 2013 7:42 pm UTC
- IRC channel for puzzle-lovers
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- Whose garden has the burgundy roses?
by cybersleuther » Tue Mar 26, 2013 9:59 am UTC - 16 Replies
- 3588 Views
- Last post by cybersleuther
Fri Apr 12, 2013 11:35 pm UTC
- Whose garden has the burgundy roses?
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- A variation of the "Impossible puzzle"
by macho » Wed Apr 10, 2013 12:09 pm UTC - 10 Replies
- 1493 Views
- Last post by macho
Thu Apr 11, 2013 10:23 am UTC
- A variation of the "Impossible puzzle"
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- Two containers each of size 30 ml and 50 ml volumes.
by chhenning » Fri Apr 05, 2013 12:39 am UTC - 4 Replies
- 1627 Views
- Last post by chhenning
Fri Apr 05, 2013 1:40 pm UTC
- Two containers each of size 30 ml and 50 ml volumes.
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- Boat and container
by Kinro » Mon Apr 01, 2013 11:53 pm UTC - 1 Replies
- 636 Views
- Last post by jestingrabbit
Tue Apr 02, 2013 9:50 am UTC
- Boat and container
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- Logicaus Strictimanus 24
by dudiobugtron » Fri Nov 23, 2012 10:20 pm UTC - 14 Replies
- 3009 Views
- Last post by shinkyo00
Wed Mar 27, 2013 5:05 am UTC
- Logicaus Strictimanus 24
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- Another gambling puzzle
by mward » Tue May 22, 2012 8:03 am UTC - 7 Replies
- 3098 Views
- Last post by tomtom2357
Fri Mar 22, 2013 2:12 am UTC
- Another gambling puzzle
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- Cipher Help
by Mars o' War » Wed Mar 13, 2013 7:47 pm UTC - 1 Replies
- 442 Views
- Last post by Ended
Wed Mar 20, 2013 3:22 pm UTC
- Cipher Help
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- The answer is slimy.
by quadmaster » Fri Mar 08, 2013 1:54 am UTC - 12 Replies
- 2241 Views
- Last post by Qaanol
Sat Mar 16, 2013 8:44 pm UTC
- The answer is slimy.
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- Birthday Problem (variation)
by knight427 » Wed Mar 06, 2013 6:08 am UTC - 11 Replies
- 1688 Views
- Last post by Vytron
Fri Mar 15, 2013 1:24 am UTC
- Birthday Problem (variation)
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- Finding a party
by Xias » Sun Mar 10, 2013 8:22 am UTC
- 3 Replies
- 665 Views
- Last post by GeoffreyY
Sun Mar 10, 2013 9:51 am UTC
- Finding a party
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- Raven's Progressively More Annoying Matrices
1, 2 by sixes_and_sevens » Mon Jun 29, 2009 3:40 pm UTC
- 45 Replies
- 29207 Views
- Last post by pistons9876
Sat Mar 09, 2013 9:19 pm UTC
- Raven's Progressively More Annoying Matrices
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- Breaking my code
by liveboy21 » Thu Feb 14, 2013 2:17 am UTC - 4 Replies
- 1567 Views
- Last post by snowyowl
Mon Mar 04, 2013 9:41 am UTC
- Breaking my code
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- Tea or Coffee
by syd16 » Sun Feb 10, 2013 5:53 pm UTC - 13 Replies
- 2509 Views
- Last post by philsov
Tue Feb 26, 2013 3:38 pm UTC
- Tea or Coffee
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- Conformist code
by quadmaster » Fri Feb 22, 2013 8:36 pm UTC - 5 Replies
- 964 Views
- Last post by quadmaster
Mon Feb 25, 2013 3:12 am UTC
- Conformist code
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- What do the following items have in common?
by Anonymous37 » Wed Feb 20, 2013 9:31 pm UTC - 1 Replies
- 765 Views
- Last post by eulerIV
Thu Feb 21, 2013 4:03 am UTC
- What do the following items have in common?
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- Find a power outlet in a dark room
by LSK » Wed Dec 19, 2012 12:37 am UTC - 22 Replies
- 3957 Views
- Last post by Bloopy
Fri Feb 15, 2013 1:24 am UTC
- Find a power outlet in a dark room
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- [code] Evil Angel
by rhambling » Tue Feb 12, 2013 2:54 am UTC - 3 Replies
- 1238 Views
- Last post by jaap
Tue Feb 12, 2013 9:51 pm UTC
- [code] Evil Angel
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- One line indecipherable cipher
by davidy22 » Sat Jan 26, 2013 9:47 am UTC - 6 Replies
- 1355 Views
- Last post by Tirian
Sun Jan 27, 2013 1:23 am UTC
- One line indecipherable cipher
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- Is it fair?
by Lunch Meat » Fri Jan 18, 2013 10:36 pm UTC - 2 Replies
- 1315 Views
- Last post by Gwydion
Mon Jan 21, 2013 5:27 pm UTC
- Is it fair?
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- New abstract game : Sozee
by Combinatorics123 » Fri Jan 18, 2013 5:26 pm UTC
- 24 Replies
- 1827 Views
- Last post by jestingrabbit
Mon Jan 21, 2013 8:30 am UTC
- New abstract game : Sozee
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- New abstract game : Exasott
1, 2 by Combinatorics123 » Fri Oct 26, 2012 6:27 pm UTC
- 56 Replies
- 6291 Views
- Last post by Combinatorics123
Sat Jan 19, 2013 10:35 pm UTC
- New abstract game : Exasott
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- Möbius Magic Cross puzzle
by ArDeeJ » Sun Dec 30, 2012 12:12 am UTC - 5 Replies
- 1435 Views
- Last post by Vytron
Sat Jan 19, 2013 6:46 am UTC
- Möbius Magic Cross puzzle
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- Find the 2013th digit after the decimal point
by coriander » Thu Jan 17, 2013 3:41 pm UTC - 2 Replies
- 1000 Views
- Last post by jestingrabbit
Fri Jan 18, 2013 10:57 am UTC
- Find the 2013th digit after the decimal point
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- Knights, Knaves and Normals. [solution]
by HarbingerOfTheDarkHeavens » Mon Sep 17, 2007 3:43 pm UTC - 16 Replies
- 4034 Views
- Last post by Tirian
Fri Jan 18, 2013 7:00 am UTC
- Knights, Knaves and Normals. [solution]
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- Blocking game
by Combinatorics123 » Sun Nov 18, 2012 1:21 pm UTC
- 8 Replies
- 1568 Views
- Last post by douglasm
Thu Jan 17, 2013 9:40 pm UTC
- Blocking game
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- Video Logic Puzzle
by maniac853 » Fri Dec 07, 2012 8:09 am UTC - 8 Replies
- 1597 Views
- Last post by BigNose
Thu Jan 17, 2013 12:35 pm UTC
- Video Logic Puzzle
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- Solve ALL of the Mazes [solutions]
by Lopsidation » Mon Jan 07, 2013 4:14 am UTC
- 29 Replies
- 3424 Views
- Last post by dudiobugtron
Wed Jan 16, 2013 7:21 pm UTC
- Solve ALL of the Mazes [solutions]
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- The Infection
by horsepaper » Mon Jan 14, 2013 8:36 am UTC - 19 Replies
- 1641 Views
- Last post by jedelmania
Wed Jan 16, 2013 1:59 pm UTC
- The Infection
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- Removed
by Combinatorics123 » Wed Jan 16, 2013 2:13 am UTC - 2 Replies
- 781 Views
- Last post by jestingrabbit
Wed Jan 16, 2013 7:08 am UTC
- Removed
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- Seventeen "Blue Eyes" Objections and Responses [SPOILER]
1, 2by Lenoxus » Thu Feb 02, 2012 2:05 am UTC - 73 Replies
- 16460 Views
- Last post by Lenoxus
Thu Jan 10, 2013 6:10 pm UTC
- Seventeen "Blue Eyes" Objections and Responses [SPOILER]
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