The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

   
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Visitor Submitted Puzzles

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No new posts Question for our puzzle-solvers
0 Courk 471 Sun Jul 19, 2009 1:02 pm
Courk View latest post
No new posts Die shaving (not a male-grooming thread)
11 Changabooniggiwan 619 Fri Jul 17, 2009 5:11 pm
fadeblue View latest post
No new posts Ten subsets of [0, 1]
2 bonanova 248 Fri Jul 17, 2009 2:27 pm
Zag View latest post
No new posts A long division alphametic
2 mathgrant 341 Fri Jul 17, 2009 4:22 am
referee View latest post
No new posts Some random chess problem I found
8 mathgrant 507 Wed Jul 15, 2009 9:17 pm
Courk View latest post
No new posts Inspired by Mathgrant's Chess Puzzle
7 Griffin 341 Wed Jul 15, 2009 7:35 pm
Griffin View latest post
No new posts Safecracker!
18 KomradRikardo 2246 Thu Jul 02, 2009 3:44 pm
jesternl View latest post
No new posts Kryptos anyone?
4 Mr Nigma 424 Wed Jul 01, 2009 9:51 pm
marcusI View latest post
No new posts Know any good puzzles for kids?
31 Talitha 1070 Wed Jul 01, 2009 1:24 am
Mr Nigma View latest post
No new posts A Simple Probability Question
14 extropalopakettle 705 Mon Jun 22, 2009 7:14 pm
ChickenMarengo View latest post
No new posts Cellular Automata in Excel
3 Lepton 768 Mon Jun 15, 2009 2:31 pm
lostdummy View latest post
No new posts Jam session
11 Hitchhiker 528 Mon Jun 01, 2009 6:01 pm
Hitchhiker View latest post
No new posts Strange Christmas Light Timings
3 Lepton 407 Mon Jun 01, 2009 4:34 am
KomradRikardo View latest post
No new posts Fun and games
10 jatill 589 Mon May 18, 2009 4:59 am
Griffin View latest post
No new posts An alogorithm for this puzzle?
18 Seablade 755 Thu May 14, 2009 1:43 pm
Termital View latest post
No new posts Solve Puzzle, Win $500
14 solve4cash 544 Tue May 05, 2009 11:01 pm
Loki View latest post
No new posts Probability problem from Braingle
27 Zag 1044 Wed Apr 29, 2009 4:01 pm
Zag View latest post
No new posts Keywords
6 Loki 318 Tue Apr 21, 2009 9:14 pm
Loki View latest post
No new posts Composes with itself to be its antiderivative
8 dethwing 536 Sat Apr 18, 2009 3:22 pm
Zag View latest post
No new posts Looking for help designing a puzzle for a heirloom project.
11 JonnyRotten 458 Tue Apr 14, 2009 4:11 pm
JonnyRotten View latest post
No new posts Assault with Battery--5/5 solved
26 Coyote 761 Mon Apr 13, 2009 8:33 am
Coyote View latest post
No new posts CISRA Puzzle Contest 2009
3 mole 334 Mon Apr 06, 2009 9:28 am
Lepton* View latest post
No new posts Predicting cards color
10 lostdummy 566 Sun Mar 22, 2009 5:52 pm
Thok View latest post
No new posts Matching and Thrown cards
12 lostdummy 428 Fri Mar 20, 2009 10:52 am
L'lanmal View latest post
No new posts Yes! He's done it! His first paragraph puzzle!
4 kaich 411 Fri Mar 20, 2009 12:01 am
kaich View latest post
No new posts Alphabet Soup
5 Death Mage 384 Wed Mar 18, 2009 2:30 am
ralphmerridew View latest post
No new posts Bingo probability.
11 Death Mage 548 Fri Mar 13, 2009 11:06 pm
marcusI View latest post
No new posts Smarmy Pie with Chestnuts
2 Changabooniggiwan 417 Wed Mar 11, 2009 7:07 pm
lostdummy View latest post
No new posts I'm sure htis is a chestnut... but I'm stumped
6 Macros 486 Tue Mar 10, 2009 11:52 pm
ralphmerridew View latest post
No new posts THE SECRET FORMULA with REAL CASH PRIZE
7 bustorobo 601 Sun Mar 08, 2009 9:00 pm
bustorobo View latest post
No new posts An Unusual Text
15 Gomez 563 Wed Feb 25, 2009 8:01 pm
Zag View latest post
No new posts Coloring graphs and sorting people
2 bonanova 262 Tue Feb 24, 2009 1:51 pm
ralphmerridew View latest post
No new posts Thinkfun's 36 Cube Puzzle
0 mtc32 354 Mon Feb 23, 2009 4:49 pm
mtc32 View latest post
No new posts Fitting 7 Tetrominoes and 4 Septominoes
2 mtc32 321 Mon Feb 23, 2009 4:09 pm
mtc32 View latest post
No new posts Very Dense Probability
19 Griffin 757 Fri Feb 20, 2009 8:10 am
Bicho the Inhaler View latest post
No new posts Bemusing Prose
31 Zag 887 Tue Feb 17, 2009 1:01 am
ralphmerridew View latest post
No new posts Loci problem
2 Changabooniggiwan 358 Thu Feb 12, 2009 4:27 pm
Chuck View latest post
No new posts A quickie from a newspaper
5 Antrax 408 Wed Feb 11, 2009 9:57 am
Tony Gardner View latest post
No new posts My Three Songs
10 dethwing 555 Fri Jan 16, 2009 2:33 pm
dethwing View latest post
No new posts Skinny Dakota on the Fourth of July
19 Zag 611 Sun Jan 11, 2009 7:47 pm
Zag View latest post
No new posts Another perspective problem
1 Courk 240 Tue Jan 06, 2009 3:44 pm
bonanova View latest post
No new posts Anyone up for solving last issue of Panda magazine?
1 karsan 355 Mon Dec 29, 2008 2:16 am
LordKinbote View latest post
No new posts construct an equlateral triangle - using what?
3 bonanova 426 Wed Dec 24, 2008 10:21 am
Griffin View latest post
No new posts Quick Wits
8 mathgrant 638 Mon Dec 22, 2008 1:58 pm
Jack_Ian View latest post
No new posts Fill In The Blanks
5 mathgrant 363 Sun Dec 21, 2008 4:12 pm
mathgrant View latest post
No new posts Sheet Cutting
29 Changabooniggiwan 1148 Fri Dec 19, 2008 10:05 pm
Nsof View latest post
No new posts The bonanova hypothesis
7 bonanova 471 Fri Dec 19, 2008 12:12 am
bonanova View latest post
No new posts Ode to my dentist, with a nod once again to Bill
4 bonanova 331 Wed Dec 10, 2008 7:53 pm
bonanova View latest post
No new posts Measuring my table
7 bonanova 385 Fri Dec 05, 2008 2:33 pm
lostdummy View latest post
No new posts The Word Analyzer
36 Griffin 964 Fri Dec 05, 2008 1:14 pm
bonanova View latest post
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