Brain Teasers and Puzzles

639 topics in this forum

1. Super-Mega-Huge-Ginormous RIDDLE! 1 2 3

   By kaos, August 13, 2006
   • 64 replies
   • 8.9k views
   • 
   • hgupta
   • September 9, 2006

2. symbolic language used for an equation

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

3. Terahertz Shielding

   By Citizen, July 27, 2010
   • 12 replies
   • 3.2k views
   • 
   • John Cuthber
   • January 18, 2012

4. Termperature conversion conundrum.

   By E.E. DS Avalon, January 14, 2023
   • 2 replies
   • 596 views
   • 
   • E.E. DS Avalon
   • January 14, 2023

5. tesseract's riddles thread

   By Tesseract, February 15, 2005
   • 21 replies
   • 6k views
   • 
   • Pre4edgc
   • February 28, 2007

6. Test of an Examiner

   By Spiri.Of.Genius, January 11, 2018
   • 3 replies
   • 1.6k views
   • 
   • swansont
   • January 14, 2018

7. The 16 fundamental logical operators

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

8. The 4-equations

   By Trond, December 24, 2005
   • 3 replies
   • 1.3k views
   • 
   • Trond
   • December 24, 2005

9. The Avatar's question

   By TimeSpaceLightForce, October 19, 2012
   • 2 replies
   • 1.3k views
   • 
   • TimeSpaceLightForce
   • October 19, 2012

10. The Blind Mathematician

    By Miss Perfect, January 18, 2006
    • 11 replies
    • 3k views
    • 
    • Miss Perfect
    • January 20, 2006

11. The Bus Driver

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

12. The Bus Number

    By Sriman Dutta, December 18, 2016
    • 11 replies
    • 2.7k views
    • 
    • John Cuthber
    • March 17, 2017

13. The Enigmatic Giant

    By LaurieAG, December 28, 2012
    • 12 replies
    • 3.8k views
    • 
    • BrainTrainer
    • October 19, 2014

14. the fox and the goose

    By syntax252, March 21, 2005
    • 4 replies
    • 2.1k views
    • 
    • The Thing
    • March 29, 2005

15. the hardest brainteaser ever

    By Poolshark, October 28, 2005
    • 4 replies
    • 3k views
    • 
    • imasmartgirl
    • October 29, 2005

16. The hardest quiz in math :) Can you solve it?

    By hkjkstah, July 19, 2016
    • 8 replies
    • 2.1k views
    • 
    • uncool
    • July 22, 2016

17. the impossible puzzle

    By One of the Few, July 24, 2009
    • 6 replies
    • 3.1k views
    • 
    • sandy85
    • September 8, 2009

18. The infinite Hotel Paradox - a question.

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

19. The loop

    By Genady, June 1, 2023
    • 5 replies
    • 593 views
    • 
    • Genady
    • June 6, 2023

20. The Magic of Magic Squares !

    By Commander, April 14, 2017
    • 9 replies
    • 8.4k views
    • 
    • nadia cinque
    • October 4, 2018

21. The odd ball puzzle

    By Alan McDougall, July 5, 2012
    • 10 replies
    • 9k views
    • 
    • GlassPilot
    • October 21, 2012

22. The Overcrowded Prison 1 2

    By GeniusIsDisruptive, July 10, 2017
    • 42 replies
    • 5.4k views
    • 
    • swansont
    • July 23, 2017

23. The Playing with Yourself Paradox

    By MSC, October 2, 2020
    • 9 replies
    • 2.5k views
    • 
    • MSC
    • October 3, 2020

24. The power of Imagination

    By Silence Resonance, December 5, 2010
    • 2 replies
    • 1.6k views
    • 
    • Silence Resonance
    • December 7, 2010

25. The Race

    By Endy0816, December 31, 2018
    • 20 replies
    • 2.4k views
    • 
    • MigL
    • January 10, 2019