Brain Teasers and Puzzles

639 topics in this forum

1. Bob and Alice Secure Email

   By TakenItSeriously, May 12, 2017
   • 2 replies
   • 1.9k views
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   • TakenItSeriously
   • May 12, 2017

2. More Magic?

   By goldglow, April 22, 2017
   • 3 replies
   • 1.5k views
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   • Raider5678
   • April 22, 2017

3. Magic?

   By goldglow, April 21, 2017
   • 9 replies
   • 2.3k views
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   • Delta1212
   • May 4, 2017

4. The Magic of Magic Squares !

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

5. Weighing the Merchandise !

   By Commander, April 3, 2017
   • 7 replies
   • 1.7k views
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   • Commander
   • April 14, 2017

6. Bears breakfast

   By TimeSpaceLightForce, March 30, 2017
   • 21 replies
   • 3.4k views
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   • TimeSpaceLightForce
   • April 9, 2017

7. A Very Simple Arithmetic Puzzle !

   By Commander, March 24, 2017
   • 13 replies
   • 2.3k views
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   • Sensei
   • March 28, 2017

8. What do Penicillin, Velcro, Viagra and PI all have in common?

   By teacherman9000, March 10, 2017
   • 2 replies
   • 1.5k views
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   • Daecon
   • March 16, 2017

9. Palindromes by multiplication

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

10. 2 Very cool chess puzzles

    By Lord Antares, February 6, 2017
    • 14 replies
    • 4.6k views
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    • Lord Antares
    • February 8, 2017

11. Another Simple Puzzle !

    By Commander, February 5, 2017
    • 12 replies
    • 2k views
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    • Commander
    • February 6, 2017

12. A straight forward Chess Puzzle ! 1 2 3

    By Commander, February 3, 2017
    • 67 replies
    • 8.4k views
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    • The Almighty
    • February 10, 2017

13. Overused tricky question?

    By The Almighty, January 13, 2017
    • 10 replies
    • 2.3k views
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    • imatfaal
    • January 21, 2017

14. Proposal for the deciphering of the Voynich Manuscript:

    By Tom O'Neil, December 29, 2016
    • 1 reply
    • 1.8k views
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    • swansont
    • December 29, 2016

15. What's the digit in the unit's place

    By Sriman Dutta, December 27, 2016
    • 2 replies
    • 1.5k views
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    • Sriman Dutta
    • December 27, 2016

16. For all Chess geniuses 1 2

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

17. The infinite Hotel Paradox - a question.

    By koti, December 21, 2016
    • 8 replies
    • 2.5k views
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    • Delta1212
    • December 23, 2016

18. The Bus Number

    By Sriman Dutta, December 18, 2016
    • 11 replies
    • 2.6k views
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    • John Cuthber
    • March 17, 2017

19. A simple question

    By The Almighty, December 16, 2016
    • 17 replies
    • 2.9k views
    • 
    • Butch
    • December 19, 2016

20. Series...

    By Sriman Dutta, December 13, 2016
    • 4 replies
    • 1.8k views
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    • imatfaal
    • December 14, 2016

21. Nails and screws

    By Butch, November 19, 2016
    • 9 replies
    • 4.8k views
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    • AbstractDreamer
    • November 22, 2016

22. Socks

    By Butch, November 18, 2016
    • 8 replies
    • 1.8k views
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    • Daecon
    • November 23, 2016

23. The unanswered puzzle

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

24. Ciphered text test.

    By Tom O'Neil, November 3, 2016
    • 10 replies
    • 3k views
    • 
    • Tom O'Neil
    • July 4, 2018

25. symbolic language used for an equation

    By Tom O'Neil, November 1, 2016
    • 11 replies
    • 2.5k views
    • 
    • AbstractDreamer
    • December 1, 2016