Brain Teasers and Puzzles

639 topics in this forum

1. some quick cripto... 1 2

   By jutntog1, April 17, 2005
   • 32 replies
   • 4.3k views
   • 
   • The Thing
   • April 24, 2005

2. A little bit fishy. 1 2

   By Wiggle, June 3, 2005
   • 31 replies
   • 6.6k views
   • 
   • clarisse
   • December 21, 2005

3. rain gauge 1 2

   By Norman Albers, December 14, 2007
   • 30 replies
   • 5.4k views
   • 
   • Norman Albers
   • January 8, 2008

4. Dividing money brain teaser 1 2

   By nowimcalm, April 10, 2010
   • 30 replies
   • 8.3k views
   • 
   • D_G
   • March 17

5. samurai vs ninja 1 2

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

6. Grid trick 1 2

   By rust8y, April 23, 2006
   • 29 replies
   • 6.4k views
   • 
   • CanadaAotS
   • August 16, 2006

7. A grid and a shape 1 2

   By Genady, March 7, 2023
   • 29 replies
   • 1.9k views
   • 
   • Genady
   • May 8, 2023

8. Solve without algebra 1 2

   By Genady, June 6, 2023
   • 29 replies
   • 1.4k views
   • 
   • Genady
   • June 13, 2023

9. 1? 1 2

   By Tigerbeam, October 5, 2005
   • 28 replies
   • 5.1k views
   • 
   • aj47
   • February 28, 2006

10. Cambridge Uni interview question 1 2

    By abskebabs, May 27, 2006
    • 28 replies
    • 6.4k views
    • 
    • scicop
    • June 2, 2006

11. Name the Play. 1 2

    By JohnB, August 21, 2006
    • 28 replies
    • 4k views
    • 
    • Phi for All
    • August 24, 2006

12. Dew point and humidity dilema, can you solve it? 1 2

    By Nick Phoenix, May 29, 2010
    • 28 replies
    • 9.6k views
    • 
    • John Cuthber
    • June 1, 2011

13. My Brain Teasers 1 2

    By Mr.Creed, November 4, 2011
    • 28 replies
    • 7.6k views
    • 
    • Mr.Creed
    • March 28, 2012

14. Mouse Track 1 2

    By TimeSpaceLightForce, September 6, 2016
    • 28 replies
    • 3.6k views
    • 
    • TimeSpaceLightForce
    • September 11, 2016

15. I need to decode this cryptogram 1 2

    By fd9, June 6, 2005
    • 27 replies
    • 5.6k views
    • 
    • calbiterol
    • June 8, 2005

16. Magnet and iron rod 1 2

    By Rajnish Kaushik, January 26, 2014
    • 27 replies
    • 4.9k views
    • 
    • John Cuthber
    • February 2, 2014

17. Which came first, the chicken or the egg? 1 2

    By Jalopy, March 2, 2022
    • 27 replies
    • 3.8k views
    • 
    • TheVat
    • Sunday at 02:31 PM

18. Horse-sense 1 2

    By Tub, February 19, 2018
    • 26 replies
    • 4.8k views
    • 
    • Hypsibius
    • March 22, 2018

19. Fun game/puzzle: Stump the clever bot 1 2

    By EquisDeXD, October 17, 2012
    • 25 replies
    • 9.4k views
    • 
    • Hendrick Laursen
    • August 1, 2015

20. Daedalus' Sixth Challenge 1 2

    By Daedalus, July 13, 2013
    • 25 replies
    • 7.2k views
    • 
    • Delta1212
    • July 20, 2013

21. black hole maths puzzle 1 2

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

22. Average speed 1 2

    By Genady, May 21, 2023
    • 25 replies
    • 2.1k views
    • 
    • Genady
    • May 23, 2023

23. Best Riddles & Trivia Here

    By supernova, September 26, 2007
    • 24 replies
    • 8.2k views
    • 
    • Jacques
    • February 5, 2008

24. Question...

    By Bettina, November 2, 2009
    • 24 replies
    • 5.5k views
    • 
    • ishmael
    • November 10, 2009

25. Story riddle

    By questionposter, April 15, 2012
    • 24 replies
    • 3.6k views
    • 
    • questionposter
    • April 19, 2012