Brain Teasers and Puzzles

648 topics in this forum

1. Black and white illusions

   By sunshaker, October 7, 2014
   • 2 replies
   • 2.4k views
   • 
   • BrainTrainer
   • October 27, 2014

2. The Enigmatic Giant

   By LaurieAG, December 28, 2012
   • 12 replies
   • 4k views
   • 
   • BrainTrainer
   • October 19, 2014

3. Meet on the Bridge?

   By studiot, October 5, 2014
   • 5 replies
   • 2.7k views
   • 
   • MonDie
   • October 6, 2014

4. EInsteins Riddle, try to solve it

   By Pameff, May 19, 2014
   • 12 replies
   • 3.2k views
   • 
   • studiot
   • September 18, 2014

5. Word puzzle assistance?

   By Sqand, August 17, 2014
   • 1 reply
   • 2k views
   • 
   • hypervalent_iodine
   • August 18, 2014

6. Cambridge Brain Sciences

   By Lightmeow, December 16, 2013
   • 1 reply
   • 5k views
   • 
   • Iota
   • August 17, 2014

7. numbers in hexagons

   By bluedot, April 11, 2014
   • 12 replies
   • 5k views
   • 
   • Acme
   • July 31, 2014

8. Puzzle2

   By Chikis, June 6, 2014
   • 1 reply
   • 1.8k views
   • 
   • Chikis
   • June 8, 2014

9. Puzzle 1

   By Chikis, May 13, 2014
   • 5 replies
   • 2.2k views
   • 
   • Chikis
   • June 4, 2014

10. Find the weights

    By Acme, February 12, 2014
    • 8 replies
    • 2.5k views
    • 
    • imatfaal
    • April 1, 2014

11. Magnet and iron rod 1 2

    By Rajnish Kaushik, January 26, 2014
    • 27 replies
    • 5.4k views
    • 
    • John Cuthber
    • February 2, 2014

12. weird sequence

    By numcaps, June 25, 2013
    • 6 replies
    • 2.8k views
    • 
    • cresol
    • January 28, 2014

13. What two numbers are missing in this series?

    By ElijahCross, October 3, 2013
    • 9 replies
    • 2.5k views
    • 
    • pears
    • November 18, 2013

14. rhymes with "False" 1 2

    By MonDie, May 10, 2013
    • 39 replies
    • 6.7k views
    • 
    • janaki
    • November 7, 2013

15. Daedalus' Ninth Challenge

    By Daedalus, October 6, 2013
    • 22 replies
    • 5.6k views
    • 
    • Daedalus
    • October 21, 2013

16. Daedalus' Eighth Challenge

    By Daedalus, September 20, 2013
    • 21 replies
    • 5.2k views
    • 
    • Unity+
    • September 30, 2013

17. Weff Riddles

    By WWLabRat, September 6, 2013
    • 8 replies
    • 4k views
    • 
    • imatfaal
    • September 27, 2013

18. Tricks

    By gwiyomi17, May 24, 2013
    • 7 replies
    • 2.6k views
    • 
    • Ihcisphysicist
    • September 8, 2013

19. A game of Abstract Logic

    By Jerry Wickey, August 31, 2013
    • 10 replies
    • 6k views
    • 
    • Jerry Wickey
    • September 7, 2013

20. Laser Switch

    By TimeSpaceLightForce, November 30, 2012
    • 15 replies
    • 3.1k views
    • 
    • TimeSpaceLightForce
    • September 1, 2013

21. The 16 fundamental logical operators

    By Jerry Wickey, August 31, 2013
    • 0 replies
    • 5.3k views
    • 
    • Jerry Wickey
    • August 31, 2013

22. Daedalus' Seventh Challenge

    By Daedalus, July 27, 2013
    • 5 replies
    • 3.5k views
    • 
    • Daedalus
    • August 20, 2013

23. Who Really Shot first?

    By hypervalent_iodine, July 31, 2013
    • 5 replies
    • 2.3k views
    • 
    • Delta1212
    • August 1, 2013

24. A phenomenal mathematical riddle involving the axiom of choice

    By Jrthedawg, July 22, 2013
    • 1 reply
    • 2.2k views
    • 
    • imatfaal
    • July 22, 2013

25. Daedalus' Sixth Challenge 1 2

    By Daedalus, July 13, 2013
    • 25 replies
    • 7.8k views
    • 
    • Delta1212
    • July 20, 2013