Brain Teasers and Puzzles

639 topics in this forum

1. Fuel consumption as an area 1 2

   By Arthur Smith, October 4, 2023
   • 35 replies
   • 1.9k views
   • 
   • Arthur Smith
   • October 6, 2023

2. Random choice question

   By Genady, September 26, 2023
   • 5 replies
   • 1.9k views
   • 
   • Growl
   • January 26

3. Find the angle

   By Genady, September 16, 2023
   • 7 replies
   • 1.7k views
   • 
   • swansont
   • January 27

4. Floating hourglass

   By Genady, September 10, 2023
   • 15 replies
   • 798 views
   • 
   • TheVat
   • September 11, 2023

5. Cube and Spheres

   By Commander, September 10, 2023
   • 9 replies
   • 839 views
   • 
   • Commander
   • September 11, 2023

6. Circles on a string

   By Genady, September 9, 2023
   • 13 replies
   • 949 views
   • 
   • Genady
   • September 10, 2023

7. Cube Cuts !

   By Commander, August 18, 2023
   • 10 replies
   • 646 views
   • 
   • Commander
   • August 19, 2023

8. Traffic, roads, and travel time

   By Genady, August 14, 2023
   • 8 replies
   • 664 views
   • 
   • TheVat
   • August 15, 2023

9. What is the mathematical equation in 2D and 3D for your body?

   By Z.10.46, August 14, 2023
   • 3 replies
   • 781 views
   • 
   • mistermack
   • August 20, 2023

10. How to meet every patient once?

    By Genady, August 12, 2023
    • 2 replies
    • 1.1k views
    • 
    • Genady
    • August 12, 2023

11. Share a Riddle

    By MSC, August 8, 2023
    • 2 replies
    • 367 views
    • 
    • MSC
    • August 8, 2023

12. Clock on an escalator

    By Genady, August 8, 2023
    • 4 replies
    • 621 views
    • 
    • joigus
    • August 9, 2023

13. Fraction

    By Commander, August 8, 2023
    • 11 replies
    • 813 views
    • 
    • Commander
    • August 17, 2023

14. Geometry - no equations needed

    By Genady, August 1, 2023
    • 16 replies
    • 949 views
    • 
    • Genady
    • August 2, 2023

15. Sum of Prime Numbers

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

16. A rope-clock

    By Genady, June 13, 2023
    • 2 replies
    • 408 views
    • 
    • Genady
    • June 15, 2023

17. Nomadic aliens

    By Genady, June 12, 2023
    • 5 replies
    • 601 views
    • 
    • Genady
    • June 16, 2023

18. Solve without algebra 1 2

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

19. The loop

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

20. Pirates 1 2 3

    By Genady, May 27, 2023
    • 62 replies
    • 2.6k views
    • 
    • npts2020
    • June 20, 2023

21. Bar magnets

    By Genady, May 26, 2023
    • 2 replies
    • 387 views
    • 
    • Genady
    • May 26, 2023

22. Prisoners' strategy

    By Genady, May 25, 2023
    • 9 replies
    • 392 views
    • 
    • Genady
    • May 25, 2023

23. A winning strategy

    By Genady, May 23, 2023
    • 14 replies
    • 558 views
    • 
    • Genady
    • May 24, 2023

24. A string length

    By Genady, May 23, 2023
    • 6 replies
    • 340 views
    • 
    • Genady
    • May 23, 2023

25. Moving train

    By Genady, May 22, 2023
    • 17 replies
    • 935 views
    • 
    • Genady
    • May 28, 2023