Brain Teasers and Puzzles

563 topics in this forum

1. fantasy idea

   By eino olavi!, January 9
   • 4 replies
   • 301 views
   • 
   • Phi for All
   • January 10

2. speed

   By eino olavi!, January 9
   • 1 reply
   • 137 views
   • 
   • swansont
   • January 10
3. idea

   Topic was moved to forum Relativity

4. New Year Puzzle

   By studiot, December 31, 2019
   • 3 replies
   • 181 views
   • 
   • studiot
   • January 3

5. New 11 Oct 2019

   By Commander, October 11, 2019
   • 1 reply
   • 841 views
   • 
   • HRassmy
   • November 12, 2019

6. a 3*3*3 Rubic Lego Cube for Blind people !!!

   By Koni, October 30, 2019
   • 0 replies
   • 435 views
   • 
   • Koni
   • October 30, 2019

7. Can you find the Number ?

   By Commander, October 15, 2019
   • 6 replies
   • 654 views
   • 
   • Sensei
   • October 17, 2019

8. How many children ?

   By Commander, October 15, 2019
   • 4 replies
   • 292 views
   • 
   • Commander
   • October 16, 2019

9. Can You Find the Number? 1 2 3

   By Umurbaba, February 14, 2019
   • 62 replies
   • 3721 views
   • 
   • Commander
   • October 15, 2019

10. A Simple Crossword !

    By Commander, October 15, 2019
    • 0 replies
    • 244 views
    • 
    • Commander
    • October 15, 2019

11. What is going on at 09:22 ?

    By Moontanman, August 8, 2019
    • 1 reply
    • 912 views
    • 
    • Roamer
    • August 22, 2019

12. Shortest Path ?

    By Commander, February 7, 2019
    • 3 replies
    • 1240 views
    • 
    • Commander
    • July 14, 2019

13. Here's an infamous brain teaser

    By thethinkertank, June 18, 2019
    • 15 replies
    • 580 views
    • 
    • Phi for All
    • June 18, 2019

14. Difficult bio question

    By Itoero, December 1, 2018
    • 8 replies
    • 1056 views
    • 
    • John Cuthber
    • June 2, 2019

15. A Balance, and a Fake Ball among the Good Ones

    By Mental Dynamist, May 17, 2019
    • 1 reply
    • 443 views
    • 
    • peterwlocke
    • May 17, 2019

16. Can you find it on the calendar?

    By Sirjon, March 22, 2019
    • 3 replies
    • 1035 views
    • 
    • peterwlocke
    • March 29, 2019

17. How to solve this?

    By GeorgeScott, February 10, 2019
    • 0 replies
    • 568 views
    • 
    • GeorgeScott
    • February 10, 2019

18. Try this one !

    By Commander, February 5, 2019
    • 5 replies
    • 683 views
    • 
    • Commander
    • February 7, 2019

19. Wtf is this puzzle?!?!?!?!

    By Branden, January 25, 2019
    • 3 replies
    • 619 views
    • 
    • CharonY
    • January 25, 2019

20. The Race

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

21. riddle

    By Itoero, January 4, 2019
    • 5 replies
    • 455 views
    • 
    • Itoero
    • January 5, 2019

22. What number?

    By Itoero, January 1, 2019
    • 2 replies
    • 387 views
    • 
    • Itoero
    • January 1, 2019

23. The switches

    By QuantumT, December 29, 2018
    • 8 replies
    • 473 views
    • 
    • QuantumT
    • December 30, 2018

24. Can you solve this puzzle?

    By oanacristina, July 27, 2018
    • 4 replies
    • 1099 views
    • 
    • sci-man
    • December 6, 2018

25. Boltzmann Brains Vs. Maxwell's Demon

    By Conjurer, November 9, 2018
    • 3 replies
    • 649 views
    • 
    • Keith Palmer
    • November 18, 2018