Brain Teasers and Puzzles

639 topics in this forum

1. Dividing money brain teaser 1 2

   By nowimcalm, April 10, 2010
   • 30 replies
   • 8.2k views
   • 
   • D_G
   • March 17

2. Puzzle for the Day 1 2 3 4

   By Commander, April 21, 2023
   • 87 replies
   • 4.6k views
   • 
   • TheVat
   • March 16

3. Find the angle

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

4. Random choice question

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

5. Fuel consumption as an area 1 2

   By Arthur Smith, October 4, 2023
   • 35 replies
   • 1.8k views
   • 
   • Arthur Smith
   • October 6, 2023

6. Cube and Spheres

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

7. Floating hourglass

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

8. Circles on a string

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

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

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

10. Cube Cuts !

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

11. Fraction

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

12. Traffic, roads, and travel time

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

13. How to meet every patient once?

    By Genady, August 12, 2023
    • 2 replies
    • 1k views
    • 
    • Genady
    • August 12, 2023

14. Clock on an escalator

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

15. Share a Riddle

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

16. Geometry - no equations needed

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

17. Sum of Prime Numbers

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

18. Pirates 1 2 3

    By Genady, May 27, 2023
    • 62 replies
    • 2.5k views
    • 
    • npts2020
    • June 20, 2023

19. Prove the negative of the Monty Hall problem 1 2

    By TakenItSeriously, July 8, 2016
    • 39 replies
    • 6.4k views
    • 
    • JeffJo
    • June 16, 2023

20. Nomadic aliens

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

21. A rope-clock

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

22. Solve without algebra 1 2

    By Genady, June 6, 2023
    • 29 replies
    • 1.4k views
    • 
    • Genady
    • June 13, 2023

23. The loop

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

24. Leaning tower

    By Genady, May 7, 2023
    • 5 replies
    • 607 views
    • 
    • Genady
    • June 5, 2023

25. Moving train

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