Brain Teasers and Puzzles

639 topics in this forum

1. The Magic of Magic Squares !

   By Commander, April 14, 2017
   • 9 replies
   • 8.2k views
   • 
   • nadia cinque
   • October 4, 2018

2. Best Riddles & Trivia Here

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

3. How is .999... = 1? 1 2

   By herpguy, January 4, 2006
   • 49 replies
   • 8.2k views
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   • Ragib
   • May 2, 2006

4. Hard Question! 1 2

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

5. The Bus Driver

   By megachirops, February 4, 2012
   • 4 replies
   • 8k views
   • 
   • searchingfortruth
   • February 6, 2012

6. Bat and Ball 1 2 3

   By YT2095, February 16, 2005
   • 56 replies
   • 7.8k views
   • 
   • Martin
   • April 10, 2005

7. A Game we can play online ! 1 2

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

8. The unanswered puzzle

   By TimeSpaceLightForce, November 11, 2016
   • 13 replies
   • 7.6k views
   • 
   • Handy andy
   • May 11, 2017

9. My Brain Teasers 1 2

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

10. LR puzzle

    By staffingby, April 1, 2013
    • 16 replies
    • 7.2k views
    • 
    • md65536
    • May 12, 2013

11. Palindromes by multiplication

    By andreis, February 12, 2017
    • 22 replies
    • 7.2k views
    • 
    • Commander
    • April 5, 2017

12. Daedalus' Sixth Challenge 1 2

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

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

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

14. Fun Encryption Puzzle

    By newageslacke, December 9, 2006
    • 3 replies
    • 7.1k views
    • 
    • Kitsy
    • July 25, 2012

15. Heres A Brain Buster! 1 2

    By theMaharajah, April 6, 2006
    • 49 replies
    • 7k views
    • 
    • Phi for All
    • May 5, 2006

16. help with a riddle me ree

    By waydol, May 23, 2010
    • 17 replies
    • 6.9k views
    • 
    • waydol
    • September 8, 2010

17. Possibility to survive a building jump? 1 2 3

    By LabRat1, July 25, 2017
    • 54 replies
    • 6.8k views
    • 
    • Itoero
    • October 10, 2017

18. Read the color, not the word.

    By radiohead, May 7, 2005
    • 20 replies
    • 6.7k views
    • 
    • Glider
    • August 28, 2005

19. A little bit fishy. 1 2

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

20. Web maze

    By iglak, December 2, 2004
    • 22 replies
    • 6.5k views
    • 
    • Callipygous
    • February 2, 2005

21. Grid trick 1 2

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

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

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

23. co-orninates

    By buttercup2daisy1, February 21, 2012
    • 5 replies
    • 6.4k views
    • 
    • buttercup2daisy1
    • February 26, 2012

24. Cambridge Uni interview question 1 2

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

25. grid numbers

    By rust8y, April 23, 2006
    • 0 replies
    • 6.3k views
    • 
    • rust8y
    • April 23, 2006