Logic Puzzles
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1, 2, 3
by Belial » Thu Jul 16, 2009 1:15 pm UTC - 89 Replies
- 36787 Views
- Last post by spudtheimpaler
Tue Nov 17, 2009 7:39 am UTC
- Unauthorized access attempts
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- xkcd Forum Rules - Updated 12 Oct 2009
by hermaj » Fri Nov 07, 2008 4:46 am UTC - 1 Replies
- 27496 Views
- Last post by hermaj
Fri Nov 07, 2008 4:47 am UTC
- xkcd Forum Rules - Updated 12 Oct 2009
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- New spoiler policy.
by jestingrabbit » Mon Oct 01, 2007 8:32 pm UTC - 31 Replies
- 14179 Views
- Last post by Lord Aurora
Thu Apr 02, 2009 5:42 pm UTC
- New spoiler policy.
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- Rules - Update Aug 23
by TheTankengine » Wed Jun 20, 2007 6:38 pm UTC - 1 Replies
- 7184 Views
- Last post by PuzzleBaron
Wed Aug 20, 2008 3:57 pm UTC
- Rules - Update Aug 23
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- The parents in puzzletown only want boys!
by java » Thu Nov 19, 2009 7:13 pm UTC - 25 Replies
- 453 Views
- Last post by jestingrabbit
Sat Nov 21, 2009 3:41 am UTC
- The parents in puzzletown only want boys!
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- Tic Tac Toe With a Twist
by krazykate » Thu Oct 15, 2009 5:29 pm UTC - 39 Replies
- 1854 Views
- Last post by KrazyerKate
Fri Nov 20, 2009 6:16 pm UTC
- Tic Tac Toe With a Twist
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- Like interpreting codes? Here is a long one! (CosmicOS)
by userxp » Tue Nov 17, 2009 10:22 pm UTC - 3 Replies
- 223 Views
- Last post by lulzfish
Fri Nov 20, 2009 12:02 am UTC
- Like interpreting codes? Here is a long one! (CosmicOS)
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- NOHOW
by cybersleuther » Thu Nov 19, 2009 7:09 am UTC - 4 Replies
- 244 Views
- Last post by WarDaft
Thu Nov 19, 2009 10:15 pm UTC
- NOHOW
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- A kind of "The Lady or the tiger" puzzle machine.
by petkish » Thu Nov 19, 2009 2:20 pm UTC - 2 Replies
- 201 Views
- Last post by jestingrabbit
Thu Nov 19, 2009 3:26 pm UTC
- A kind of "The Lady or the tiger" puzzle machine.
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- Binary Code
by Sonofacheesewhiz » Wed Nov 18, 2009 5:35 am UTC - 3 Replies
- 279 Views
- Last post by Sonofacheesewhiz
Thu Nov 19, 2009 1:17 am UTC
- Binary Code
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- Puzzles from the xkcd book
by skeptical scientist » Tue Sep 22, 2009 3:37 am UTC - 39 Replies
- 3389 Views
- Last post by jerith
Tue Nov 17, 2009 3:35 pm UTC
- Puzzles from the xkcd book
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- Binary Message Transmission Puzzle
by LewisJ » Mon Nov 16, 2009 3:15 am UTC - 9 Replies
- 338 Views
- Last post by Dutchflyboy123
Tue Nov 17, 2009 7:36 am UTC
- Binary Message Transmission Puzzle
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- Geometry puzzle
by Hertafeld » Thu Nov 05, 2009 11:11 pm UTC - 18 Replies
- 895 Views
- Last post by mr-mitch
Tue Nov 17, 2009 2:25 am UTC
- Geometry puzzle
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- One Time Pad Encryption
by Madge » Mon Nov 09, 2009 10:17 am UTC - 7 Replies
- 452 Views
- Last post by Ended
Sun Nov 15, 2009 7:05 pm UTC
- One Time Pad Encryption
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- XKCD Puzzle at College Puzzle Challenge
by jetzzfan » Sun Nov 15, 2009 6:48 am UTC - 0 Replies
- 261 Views
- Last post by jetzzfan
Sun Nov 15, 2009 6:48 am UTC
- XKCD Puzzle at College Puzzle Challenge
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- A strange email I got
1, 2by Post-Internet Syndrome » Mon Mar 23, 2009 11:46 am UTC - 42 Replies
- 4644 Views
- Last post by Arancaytar
Sun Nov 15, 2009 3:18 am UTC
- A strange email I got
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- Tough Puzzle
by Amherstclane » Sat Nov 14, 2009 6:53 am UTC - 0 Replies
- 393 Views
- Last post by Amherstclane
Sat Nov 14, 2009 6:53 am UTC
- Tough Puzzle
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- The Father Puzzle
by DavidArmstrong488 » Tue Nov 10, 2009 8:52 am UTC - 6 Replies
- 741 Views
- Last post by Malle
Fri Nov 13, 2009 8:25 am UTC
- The Father Puzzle
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- Competition, Number game
by phroxy » Mon Sep 21, 2009 8:21 am UTC - 13 Replies
- 826 Views
- Last post by Qaanol
Fri Nov 13, 2009 2:26 am UTC
- Competition, Number game
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- The surprise exam paradox
1, 2, 3, 4by tendays » Tue Mar 13, 2007 7:20 pm UTC - 148 Replies
- 23787 Views
- Last post by GenericKen
Thu Nov 12, 2009 8:59 pm UTC
- The surprise exam paradox
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- The one that stumped the teachers.
by eviloatmeal » Tue Nov 10, 2009 10:58 am UTC - 17 Replies
- 782 Views
- Last post by eviloatmeal
Wed Nov 11, 2009 4:45 am UTC
- The one that stumped the teachers.
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- 12 Craziest Google Interview Questions
by Soljer » Thu Nov 05, 2009 10:34 pm UTC - 35 Replies
- 1477 Views
- Last post by WarDaft
Wed Nov 11, 2009 1:54 am UTC
- 12 Craziest Google Interview Questions
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- defusing the logic bomb
by IIAOPSW » Mon Nov 09, 2009 6:57 pm UTC - 13 Replies
- 644 Views
- Last post by Cosmologicon
Tue Nov 10, 2009 11:59 pm UTC
- defusing the logic bomb
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- The Village Problem
by ian » Tue Nov 10, 2009 8:30 am UTC - 1 Replies
- 259 Views
- Last post by jestingrabbit
Tue Nov 10, 2009 10:24 am UTC
- The Village Problem
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- class challenge
by bocochoco » Thu Oct 01, 2009 10:34 pm UTC - 39 Replies
- 1661 Views
- Last post by bocochoco
Mon Nov 09, 2009 8:33 pm UTC
- class challenge
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- Marble Dropping
by Andy » Mon Aug 28, 2006 10:47 am UTC - 33 Replies
- 10261 Views
- Last post by Qaanol
Mon Nov 09, 2009 4:31 am UTC
- Marble Dropping
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- Three Paths
by Hertafeld » Sat Oct 31, 2009 2:19 am UTC - 5 Replies
- 607 Views
- Last post by WarDaft
Sun Nov 08, 2009 11:15 pm UTC
- Three Paths
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- Can you break my code?
by Klotz » Sat Oct 31, 2009 4:02 pm UTC - 17 Replies
- 867 Views
- Last post by Cosmologicon
Sun Nov 08, 2009 10:47 pm UTC
- Can you break my code?
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- 3 Businessmen at a hotel
by ipwashington » Fri Nov 06, 2009 4:20 am UTC - 2 Replies
- 464 Views
- Last post by jestingrabbit
Fri Nov 06, 2009 1:02 pm UTC
- 3 Businessmen at a hotel
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- What do these words have in common?
1, 2, 3by skeptical scientist » Thu Oct 22, 2009 10:50 am UTC - 97 Replies
- 2314 Views
- Last post by dedalus
Fri Nov 06, 2009 9:48 am UTC
- What do these words have in common?
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- Yet Another Number Sequence (easy?)
by aporia » Sat Oct 24, 2009 3:23 pm UTC - 3 Replies
- 650 Views
- Last post by aporia
Thu Nov 05, 2009 5:10 pm UTC
- Yet Another Number Sequence (easy?)
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- Lightbulb
by ianistheking95 » Tue Nov 03, 2009 1:06 am UTC - 28 Replies
- 766 Views
- Last post by Puck
Thu Nov 05, 2009 2:55 pm UTC
- Lightbulb
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- Three princesses
1 ... 8, 9, 10by Fleshpiston » Fri Jul 14, 2006 8:25 am UTC - 364 Replies
- 82057 Views
- Last post by Madge
Thu Nov 05, 2009 3:20 am UTC
- Three princesses
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- Tetris Strategy
by krazykate » Mon Sep 21, 2009 6:42 pm UTC - 15 Replies
- 1719 Views
- Last post by jestingrabbit
Tue Nov 03, 2009 4:06 am UTC
- Tetris Strategy
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- Three men under a tree
by Hertafeld » Sat Oct 31, 2009 3:51 am UTC - 3 Replies
- 527 Views
- Last post by jestingrabbit
Sat Oct 31, 2009 7:17 am UTC
- Three men under a tree
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- Magnet and a block of metal
by Gnatty » Sat Oct 24, 2009 11:09 am UTC - 11 Replies
- 942 Views
- Last post by Nande_Ebisu?
Tue Oct 27, 2009 11:13 pm UTC
- Magnet and a block of metal
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- Football squares
by Xami » Wed Sep 30, 2009 6:34 pm UTC - 5 Replies
- 867 Views
- Last post by skeptical scientist
Mon Oct 26, 2009 8:42 am UTC
- Football squares
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- Criminals, splitting money.
by Fin Archangel » Fri Sep 11, 2009 12:46 am UTC - 29 Replies
- 1838 Views
- Last post by phlip
Mon Oct 26, 2009 5:00 am UTC
- Criminals, splitting money.
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- another pretentious number sequence
by a1s » Fri Sep 25, 2009 1:05 am UTC - 10 Replies
- 871 Views
- Last post by SidMason
Mon Oct 26, 2009 4:53 am UTC
- another pretentious number sequence
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- 169 puzzles (was 'mind trap')
1 ... 8, 9, 10by paradoxeater » Sat Jan 31, 2009 8:41 pm UTC - 371 Replies
- 11130 Views
- Last post by phlip
Sun Oct 25, 2009 1:21 am UTC
- 169 puzzles (was 'mind trap')
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- A Numerical Challenge...
by stainless » Wed Oct 21, 2009 9:03 am UTC - 9 Replies
- 644 Views
- Last post by a1s
Fri Oct 23, 2009 9:29 am UTC
- A Numerical Challenge...
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- Sort these computers
by Godskalken » Thu Sep 24, 2009 11:34 pm UTC - 22 Replies
- 1302 Views
- Last post by dedalus
Thu Oct 22, 2009 12:32 am UTC
- Sort these computers
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- Word Puzzles
by quintopia » Mon Oct 19, 2009 10:34 pm UTC - 7 Replies
- 459 Views
- Last post by greengiant
Tue Oct 20, 2009 11:37 am UTC
- Word Puzzles
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- yet another cipher
by bocochoco » Fri Oct 16, 2009 2:29 pm UTC - 4 Replies
- 310 Views
- Last post by bocochoco
Mon Oct 19, 2009 2:02 pm UTC
- yet another cipher
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- Ordering of Vases [solution]
by skeptical scientist » Wed Sep 09, 2009 10:06 pm UTC - 14 Replies
- 752 Views
- Last post by Wildcard
Sat Oct 17, 2009 8:12 pm UTC
- Ordering of Vases [solution]
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- A Dice Game
by quintopia » Thu Oct 15, 2009 10:33 pm UTC - 2 Replies
- 462 Views
- Last post by Qaanol
Sat Oct 17, 2009 2:08 am UTC
- A Dice Game
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- brain in a vat
1, 2, 3, 4, 5by ponzerelli » Tue Aug 18, 2009 9:58 pm UTC - 184 Replies
- 6268 Views
- Last post by mr-mitch
Thu Oct 15, 2009 2:13 pm UTC
- brain in a vat
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