Brain Teasers and Puzzles

643 topics in this forum

1. Find the Area !

   By Commander, July 30
   • 2 replies
   • 505 views
   • 
   • Commander
   • August 20

2. My grandfather got this puzzle in the 1970's.

   By JohnDBarrow, August 7
   • 1 reply
   • 485 views
   • 
   • JohnDBarrow
   • August 8

3. Doorstep Survey

   By toucana, August 3
   • 7 replies
   • 327 views
   • 
   • Externet
   • August 4

4. Layout !

   By Commander, July 15
   • 0 replies
   • 453 views
   • 
   • Commander
   • July 15

5. Which came first, the chicken or the egg? 1 2

   By Jalopy, March 2, 2022
   • 27 replies
   • 6.4k views
   • 
   • TheVat
   • April 21

6. Dividing money brain teaser 1 2

   By nowimcalm, April 10, 2010
   • 30 replies
   • 9.3k views
   • 
   • D_G
   • March 17

7. Puzzle for the Day 1 2 3 4

   By Commander, April 21, 2023
   • 87 replies
   • 5.8k views
   • 
   • TheVat
   • March 16

8. Find the angle

   By Genady, September 16, 2023
   • 7 replies
   • 2.2k views
   • 
   • swansont
   • January 27

9. Random choice question

   By Genady, September 26, 2023
   • 5 replies
   • 2.3k views
   • 
   • Growl
   • January 26

10. Fuel consumption as an area 1 2

    By Arthur Smith, October 4, 2023
    • 35 replies
    • 2.4k views
    • 
    • Arthur Smith
    • October 6, 2023

11. Cube and Spheres

    By Commander, September 10, 2023
    • 9 replies
    • 1.2k views
    • 
    • Commander
    • September 11, 2023

12. Floating hourglass

    By Genady, September 10, 2023
    • 15 replies
    • 1.2k views
    • 
    • TheVat
    • September 11, 2023

13. Circles on a string

    By Genady, September 9, 2023
    • 13 replies
    • 1.3k views
    • 
    • Genady
    • September 10, 2023

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

    By Z.10.46, August 14, 2023
    • 3 replies
    • 1.1k views
    • 
    • mistermack
    • August 20, 2023

15. Cube Cuts !

    By Commander, August 18, 2023
    • 10 replies
    • 1.1k views
    • 
    • Commander
    • August 19, 2023

16. Fraction

    By Commander, August 8, 2023
    • 11 replies
    • 1.2k views
    • 
    • Commander
    • August 17, 2023

17. Traffic, roads, and travel time

    By Genady, August 14, 2023
    • 8 replies
    • 1k views
    • 
    • TheVat
    • August 15, 2023

18. How to meet every patient once?

    By Genady, August 12, 2023
    • 2 replies
    • 1.4k views
    • 
    • Genady
    • August 12, 2023

19. Clock on an escalator

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

20. Share a Riddle

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

21. Geometry - no equations needed

    By Genady, August 1, 2023
    • 16 replies
    • 1.4k views
    • 
    • Genady
    • August 2, 2023

22. Sum of Prime Numbers

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

23. Pirates 1 2 3

    By Genady, May 27, 2023
    • 62 replies
    • 3.3k views
    • 
    • npts2020
    • June 20, 2023

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

    By TakenItSeriously, July 8, 2016
    • 39 replies
    • 7k views
    • 
    • JeffJo
    • June 16, 2023

25. Nomadic aliens

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