Brain Teasers and Puzzles

639 topics in this forum

1. Solve without algebra 1 2

   By Genady, June 6, 2023
   • 29 replies
   • 1.5k views
   • 
   • Genady
   • June 13, 2023

2. Some awesome puzzles

   By Cyrix, February 19, 2006
   • 1 reply
   • 2.8k views
   • 
   • aceman
   • February 24, 2006

3. Some I.Q. questions.

   By M.Saad, August 21, 2009
   • 5 replies
   • 4.3k views
   • 
   • ferrywayes
   • September 15, 2009

4. some long crypto...

   By Dak, April 19, 2005
   • 8 replies
   • 1.8k views
   • 
   • Dak
   • April 28, 2005

5. Some ONe anwser This Riddle

   By H.P.T Mobbster, April 18, 2005
   • 8 replies
   • 2.1k views
   • 
   • Callipygous
   • May 4, 2005

6. some quick cripto... 1 2

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

7. Sorry, the Hilbert hotel is full.

   By md65536, September 1, 2011
   • 6 replies
   • 2.7k views
   • 
   • md65536
   • September 29, 2011

8. Speak my name

   By Siderney_Mello_Pops, February 15, 2011
   • 6 replies
   • 2.9k views
   • 
   • CaptainPanic
   • April 11, 2011

9. Special room

   By questionposter, March 23, 2012
   • 12 replies
   • 1.9k views
   • 
   • questionposter
   • March 23, 2012

10. speed

    By eino olavi!, January 9, 2020
    • 1 reply
    • 1.3k views
    • 
    • swansont
    • January 10, 2020

11. Spider and Fly problem

    By psi20, June 21, 2006
    • 13 replies
    • 6k views
    • 
    • uncool
    • September 24, 2006

12. Spot the Magnetized Coin among 39 Coins in 4 weighings !

    By Commander, August 11, 2015
    • 0 replies
    • 1.7k views
    • 
    • Commander
    • August 11, 2015

13. Squares and Cubes

    By Sriman Dutta, October 18, 2016
    • 10 replies
    • 1.7k views
    • 
    • Sriman Dutta
    • October 21, 2016

14. Squares Puzzle

    By noz92, January 15, 2005
    • 3 replies
    • 2.6k views
    • 
    • BenSon
    • March 18, 2005

15. Story riddle

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

16. Story riddle

    By questionposter, April 22, 2012
    • 23 replies
    • 5.2k views
    • 
    • jimmyjammy
    • June 14, 2013

17. Stretch your mind - a litle bit of fun 1 2 3 4 10

    By mossoi, November 17, 2004
    • 236 replies
    • 32.2k views
    • 
    • Commander
    • December 13, 2014

18. String Game

    By Kyle, December 31, 2005
    • 3 replies
    • 2.5k views
    • 
    • Mart
    • January 2, 2006

19. stupid thing thats bothering me

    By blackhole123, June 21, 2006
    • 13 replies
    • 3.1k views
    • 
    • CanadaAotS
    • August 16, 2006

20. Subliminal Messages!

    By WaR, March 16, 2006
    • 21 replies
    • 6.2k views
    • 
    • jame334
    • June 26, 2008

21. Subtext cipher?

    By CACHERX, September 30, 2011
    • 6 replies
    • 21.3k views
    • 
    • Maro
    • September 13, 2021

22. Subtext cipher?

    By Xorim, February 1, 2021
    • 3 replies
    • 2.7k views
    • 
    • Sensei
    • February 8, 2021

23. Sudoku

    By Mokele, June 5, 2005
    • 5 replies
    • 2.6k views
    • 
    • Walden
    • August 3, 2005

24. Sum of Prime Numbers

    By Genady, July 5, 2023
    • 6 replies
    • 590 views
    • 
    • Genady
    • July 5, 2023

25. Super-Mega-Huge-Ginormous RIDDLE is back!

    By kaos, July 3, 2007
    • 18 replies
    • 3.1k views
    • 
    • doG
    • November 29, 2007