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
- 202615 Views
- 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
- 12407 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
- 2052 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
- 32252 Views
- Last post by MasterOfAll
Thu Nov 01, 2012 3:45 pm UTC
- New spoiler policy.
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- Test-solve my puzzles, please
by ArDeeJ » Sun Jun 16, 2013 3:35 pm UTC - 8 Replies
- 682 Views
- Last post by ArDeeJ
Tue Jun 18, 2013 11:08 pm UTC
- Test-solve my puzzles, please
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- "Elvish" cipher
by darkspork » Mon Jun 17, 2013 6:16 pm UTC
- 0 Replies
- 128 Views
- Last post by darkspork
Mon Jun 17, 2013 6:16 pm UTC
- "Elvish" cipher
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- Hats
by atomicenergy » Tue May 28, 2013 11:30 pm UTC - 37 Replies
- 1633 Views
- Last post by rmsgrey
Mon Jun 17, 2013 3:44 pm UTC
- Hats
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- The case of the mysterious dead fish
by waylandsmithy » Fri Jun 14, 2013 6:27 pm UTC - 2 Replies
- 184 Views
- Last post by jestingrabbit
Mon Jun 17, 2013 2:55 pm UTC
- The case of the mysterious dead fish
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- Can you crack this code?
by ibgdude » Mon Jun 03, 2013 7:55 am UTC
- 9 Replies
- 1806 Views
- Last post by Tim Harrod
Wed Jun 12, 2013 11:24 am UTC
- Can you crack this code?
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- My Hobby: Steganography
1, 2 by ThirdParty » Mon May 20, 2013 2:54 pm UTC
- 54 Replies
- 3777 Views
- Last post by Red Hal
Fri Jun 07, 2013 11:38 pm UTC
- My Hobby: Steganography
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- What type of puzzle is this?
by sbarrack » Fri Jun 07, 2013 1:43 am UTC - 9 Replies
- 563 Views
- Last post by sbarrack
Fri Jun 07, 2013 10:53 pm UTC
- What type of puzzle is this?
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- How not to write a CSPRNG
by Thesh » Thu Jun 06, 2013 6:55 am UTC - 4 Replies
- 493 Views
- Last post by Thesh
Fri Jun 07, 2013 7:03 pm UTC
- How not to write a CSPRNG
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- help for this code
by sarahlicious » Mon Jun 03, 2013 6:10 pm UTC - 6 Replies
- 832 Views
- Last post by sarahlicious
Thu Jun 06, 2013 9:34 am UTC
- help for this code
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- Hat puzzle - 6 (or n) randomly coloured hats in a circle.
by dudiobugtron » Wed Jun 05, 2013 1:52 am UTC - 5 Replies
- 578 Views
- Last post by Lopsidation
Wed Jun 05, 2013 11:15 pm UTC
- Hat puzzle - 6 (or n) randomly coloured hats in a circle.
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- Whose garden has the burgundy roses?
by cybersleuther » Tue Mar 26, 2013 9:59 am UTC
- 21 Replies
- 4356 Views
- Last post by LadyMondegreen
Sat Jun 01, 2013 8:54 am UTC
- Whose garden has the burgundy roses?
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- Help me with this puzzle!
by helpmeplz » Tue May 28, 2013 12:57 pm UTC - 8 Replies
- 719 Views
- Last post by Xias
Fri May 31, 2013 8:27 pm UTC
- Help me with this puzzle!
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- Pyramid stacking of balls
by arcanmster » Tue May 21, 2013 7:56 pm UTC - 16 Replies
- 1635 Views
- Last post by arcanmster
Thu May 30, 2013 7:36 am UTC
- Pyramid stacking of balls
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- The Curious Case of the Really Shitty Cryptogram
by thecamoninja » Wed May 15, 2013 11:32 pm UTC
- 8 Replies
- 1184 Views
- Last post by thecamoninja
Tue May 28, 2013 11:10 pm UTC
- The Curious Case of the Really Shitty Cryptogram
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- Raven's Progressively More Annoying Matrices
1, 2 by sixes_and_sevens » Mon Jun 29, 2009 3:40 pm UTC
- 46 Replies
- 30065 Views
- Last post by ballast
Tue May 28, 2013 1:48 pm UTC
- Raven's Progressively More Annoying Matrices
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- Interest rate conundrum ..........
by Moonbeam » Sun May 26, 2013 9:17 pm UTC - 2 Replies
- 443 Views
- Last post by Xias
Mon May 27, 2013 2:17 pm UTC
- Interest rate conundrum ..........
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- Help me break this riddle please.
by sarahlicious » Fri May 24, 2013 2:21 am UTC - 5 Replies
- 670 Views
- Last post by sarahlicious
Mon May 27, 2013 11:40 am UTC
- Help me break this riddle please.
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- Traditional Logic Puzzle Game
by duwease » Thu May 16, 2013 8:12 pm UTC - 3 Replies
- 757 Views
- Last post by rmsgrey
Sun May 26, 2013 11:35 pm UTC
- Traditional Logic Puzzle Game
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- 100 prisoners and a lightbulb
1, 2by Yakk » Thu Apr 12, 2007 6:19 pm UTC - 45 Replies
- 11460 Views
- Last post by rmsgrey
Sun May 26, 2013 2:45 pm UTC
- 100 prisoners and a lightbulb
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- Alien abduction
by ejsantos » Wed May 22, 2013 12:59 pm UTC - 9 Replies
- 852 Views
- Last post by ThirdParty
Fri May 24, 2013 8:47 pm UTC
- Alien abduction
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- Flow
by krazykate » Tue Jan 22, 2013 1:39 am UTC
- 17 Replies
- 5904 Views
- Last post by thomasahle
Fri May 24, 2013 8:24 am UTC
- Flow
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- Mother of All Puzzles
1, 2by GeoffreyY » Fri Mar 08, 2013 12:14 pm UTC - 69 Replies
- 8223 Views
- Last post by SerialTroll
Thu May 23, 2013 1:41 pm UTC
- Mother of All Puzzles
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- Team challenge
by Matthijsss » Wed May 08, 2013 3:40 pm UTC - 22 Replies
- 1371 Views
- Last post by jaap
Thu May 23, 2013 12:27 pm UTC
- Team challenge
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- Can you crack my code? Version two
by Jumper_0 » Sun Apr 21, 2013 5:23 am UTC - 9 Replies
- 943 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 truthteller and the politician
1, 2by liveboy21 » Fri Dec 28, 2012 12:22 pm UTC - 65 Replies
- 10158 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
- 687 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
- 983 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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- A meta-riddle?
by alessandro95 » Thu Apr 25, 2013 8:09 am UTC - 39 Replies
- 1838 Views
- Last post by ALFERALFER
Tue Apr 30, 2013 9:21 pm UTC
- A meta-riddle?
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- A very interesting Mathematical Paradox
1 ... 8, 9, 10by sabbathxxl » Mon Sep 25, 2006 1:07 am UTC - 387 Replies
- 85400 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
- 12401 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
- 3484 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
- 842 Views
- Last post by zachbarnett
Sat Apr 13, 2013 7:42 pm UTC
- IRC channel for puzzle-lovers
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- A variation of the "Impossible puzzle"
by macho » Wed Apr 10, 2013 12:09 pm UTC - 10 Replies
- 1726 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
- 1870 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
- 847 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
- 3284 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
- 3334 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
- 610 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
- 2507 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
- 2008 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
- 852 Views
- Last post by GeoffreyY
Sun Mar 10, 2013 9:51 am UTC
- Finding a party
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- Breaking my code
by liveboy21 » Thu Feb 14, 2013 2:17 am UTC - 4 Replies
- 1753 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
- 2741 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
- 1159 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
- 954 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
- 4260 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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