Brain Teasers and Puzzles

639 topics in this forum

1. Puzzling...

   By perrito, May 3, 2006
   • 6 replies
   • 104.5k views
   • 
   • chemfreak
   • June 5, 2006

2. black hole maths puzzle 1 2

   By KLIVE-alive, September 6, 2020
   • 25 replies
   • 79.5k views
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   • Dord
   • September 8, 2020

3. Impossible Brain Teaser? 1 2

   By Luminal, July 25, 2007
   • 39 replies
   • 49.3k views
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   • imatfaal
   • November 14, 2011

4. riddles 1 2 3 4 10

   By LucidDreamer, October 22, 2004
   • 236 replies
   • 44.1k views
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   • between3and26characterslon
   • October 19, 2010

5. Turtle Soup. 1 2

   By LastHit, July 27, 2013
   • 34 replies
   • 40.2k views
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   • Hypsibius
   • March 20, 2018

6. Extremely difficult question from an IQ test... 1 2 3

   By w=f[z], June 18, 2007
   • 68 replies
   • 37.8k views
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   • Raffael
   • March 6, 2008

7. Stretch your mind - a litle bit of fun 1 2 3 4 10

   By mossoi, November 17, 2004
   • 236 replies
   • 31.9k views
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   • Commander
   • December 13, 2014

8. Riddle of the Week 1 2 3 4 6

   By Kyrisch, August 12, 2005
   • 134 replies
   • 28.6k views
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   • khaled
   • February 19, 2011

9. To test your mental acuity, answer the following questions 1 2 3 4

   By Alan McDougall, January 5, 2014
   • 75 replies
   • 27.3k views
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   • TakenItSeriously
   • July 8, 2016

10. Subtext cipher?

    By CACHERX, September 30, 2011
    • 6 replies
    • 21.2k views
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    • Maro
    • September 13, 2021

11. River Crossing Riddle

    By RVJ, October 22, 2011
    • 5 replies
    • 21.2k views
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    • superball
    • November 21, 2011

12. code - can you figure it out? 1 2

    By Connor, January 13, 2006
    • 48 replies
    • 20.6k views
    • 
    • LaurieAG
    • August 30, 2012

13. Periodic Table Scrabble.

    By YT2095, August 4, 2005
    • 23 replies
    • 17.7k views
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    • BrianJonsson
    • December 16, 2008

14. Which door should you take? 1 2 3

    By TonyMcC, January 8, 2011
    • 67 replies
    • 16.6k views
    • 
    • rigney
    • January 29, 2012

15. Solve this if you can ! 1 2 3 4

    By Commander, December 17, 2014
    • 96 replies
    • 16.2k views
    • 
    • Commander
    • June 26, 2017

16. problem solving

    By smarty_pants, August 24, 2007
    • 7 replies
    • 15.6k views
    • 
    • uncool
    • August 30, 2007

17. A blind man, and two others

    By Snoggums, October 28, 2007
    • 19 replies
    • 15.5k views
    • 
    • genuresilience
    • June 15, 2008

18. Newton's puzzle 1 2

    By thedarkshade, July 8, 2009
    • 35 replies
    • 15.2k views
    • 
    • derek w
    • May 23, 2012

19. An impossible brain teaser 1 2

    By Reaper, February 16, 2008
    • 42 replies
    • 13.8k views
    • 
    • Phi for All
    • July 1, 2009

20. samurai vs ninja 1 2

    By Abreu, November 19, 2010
    • 30 replies
    • 13.4k views
    • 
    • Sciduck
    • August 5, 2011

21. secret message... i just cant figure it out! help! 1 2 3

    By Guest isuit, May 2, 2005
    • 67 replies
    • 13.4k views
    • 
    • demon
    • February 21, 2017

22. Find the Angle 1 2

    By Thud&Blunder, May 4, 2005
    • 49 replies
    • 13.2k views
    • 
    • reverse
    • May 18, 2005

23. learn your 11-20 times tables

    By CanadaAotS, August 16, 2006
    • 4 replies
    • 13.1k views
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    • Callipygous
    • August 20, 2006

24. Soduko Theory

    By Guest slacker, May 14, 2005
    • 12 replies
    • 12.2k views
    • 
    • RyanJ
    • April 1, 2006

25. The Riddles Thread 1 2 3

    By MolecularMan14, August 28, 2004
    • 50 replies
    • 11.1k views
    • 
    • Pre4edgc
    • February 28, 2007