Brain Teasers and Puzzles

639 topics in this forum

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

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

2. Time traveler puzzle 1 2

   By questionposter, March 24, 2012
   • 44 replies
   • 10.2k views
   • 
   • Epicurus
   • July 8, 2015

3. Brain teaser: travelling faster than the wind. 1 2

   By Arthur Smith, January 11, 2022
   • 44 replies
   • 3.4k views
   • 
   • md65536
   • February 10, 2022

4. The Seagull question 1 2

   By uncool, May 9, 2005
   • 43 replies
   • 9.7k views
   • 
   • Callipygous
   • July 5, 2005

5. Box Packing! 1 2

   By johny321, June 17, 2005
   • 42 replies
   • 9k views
   • 
   • msto01
   • August 21, 2008

6. An impossible brain teaser 1 2

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

7. For all Chess geniuses 1 2

   By The Almighty, December 21, 2016
   • 42 replies
   • 6k views
   • 
   • Lord Antares
   • March 5, 2017

8. The Overcrowded Prison 1 2

   By GeniusIsDisruptive, July 10, 2017
   • 42 replies
   • 5.3k views
   • 
   • swansont
   • July 23, 2017

9. A Game we can play online ! 1 2

   By Commander, September 14, 2015
   • 41 replies
   • 7.6k views
   • 
   • Commander
   • December 18, 2015

10. Impossible Brain Teaser? 1 2

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

11. Physics game 1 2

    By Bettina, August 2, 2008
    • 39 replies
    • 5.5k views
    • 
    • Kyrisch
    • August 13, 2008

12. rhymes with "False" 1 2

    By MonDie, May 10, 2013
    • 39 replies
    • 6k views
    • 
    • janaki
    • November 7, 2013

13. Prove the negative of the Monty Hall problem 1 2

    By TakenItSeriously, July 8, 2016
    • 39 replies
    • 6.4k views
    • 
    • JeffJo
    • June 16, 2023

14. Rose petals 1 2

    By Franklin, May 5, 2005
    • 37 replies
    • 5.8k views
    • 
    • reverse
    • May 31, 2005

15. Cryptography puzzle 1 2

    By RedAlert, April 22, 2005
    • 36 replies
    • 4.7k views
    • 
    • Bettina
    • April 23, 2005

16. Hard Question! 1 2

    By johny321, June 22, 2005
    • 36 replies
    • 8k views
    • 
    • serg
    • December 12, 2005

17. Gender Island 1 2

    By md65536, May 14, 2012
    • 36 replies
    • 5.7k views
    • 
    • md65536
    • June 22, 2012

18. Newton's puzzle 1 2

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

19. Fuel consumption as an area 1 2

    By Arthur Smith, October 4, 2023
    • 35 replies
    • 1.8k views
    • 
    • Arthur Smith
    • October 6, 2023

20. What do you see? 1 2

    By radiohead, July 18, 2005
    • 34 replies
    • 6.3k views
    • 
    • iglak
    • May 10, 2006

21. What time is it? 1 2

    By needimprovement, August 16, 2010
    • 34 replies
    • 8.4k views
    • 
    • apis
    • August 20, 2011

22. Turtle Soup. 1 2

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

23. craziness! 1 2

    By playdo, January 12, 2007
    • 33 replies
    • 4.4k views
    • 
    • playdo
    • January 17, 2007

24. Box in a house. 1 2

    By small bang, October 26, 2011
    • 33 replies
    • 5.3k views
    • 
    • md65536
    • November 4, 2011

25. A bit of not so serious Phun :) 1 2

    By YT2095, September 14, 2003
    • 32 replies
    • 7.2k views
    • 
    • holly_2009
    • May 10, 2006