Brain Teasers and Puzzles

648 topics in this forum

1. Chemistry/Maths Beer Pouring Puzzle

   By studiot, October 21, 2021
   • 6 replies
   • 1.6k views
   • 
   • studiot
   • October 23, 2021

2. Subtext cipher?

   By CACHERX, September 30, 2011
   • 6 replies
   • 22.1k views
   • 
   • Maro
   • September 13, 2021

3. How much land is on Kepler-22b

   By TexasJustice, May 24, 2021
   • 3 replies
   • 3k views
   • 
   • exchemist
   • May 24, 2021

4. Friends Walking !

   By Commander, November 24, 2020
   • 6 replies
   • 4.1k views
   • 
   • Commander
   • February 22, 2021

5. Subtext cipher?

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

6. A Simple Arithmetic Teaser !

   By Commander, January 22, 2021
   • 17 replies
   • 3.1k views
   • 
   • Commander
   • February 1, 2021

7. Cutting a CUBE

   By Commander, November 16, 2020
   • 9 replies
   • 2.8k views
   • 
   • Commander
   • November 19, 2020

8. The Playing with Yourself Paradox

   By MSC, October 2, 2020
   • 9 replies
   • 2.8k views
   • 
   • MSC
   • October 3, 2020

9. Correct the Dots

   By Star Walls, April 24, 2020
   • 18 replies
   • 4.4k views
   • 
   • Sirjon
   • September 15, 2020

10. black hole maths puzzle 1 2

    By KLIVE-alive, September 6, 2020
    • 25 replies
    • 80.3k views
    • 
    • Dord
    • September 8, 2020

11. Help Explain Correct Answer to my Friend .....

    By GadgetJim57, July 8, 2020
    • 6 replies
    • 2.3k views
    • 
    • HallsofIvy
    • August 27, 2020

12. Algebra

    By Achyut, May 13, 2020
    • 8 replies
    • 2.8k views
    • 
    • John Cuthber
    • May 14, 2020

13. New here and I hope this hasn't been something frowned on here.

    By MrAnderson, April 27, 2020
    • 3 replies
    • 1.6k views
    • 
    • taeto
    • April 27, 2020

14. New Year Puzzle

    By studiot, December 31, 2019
    • 8 replies
    • 3.1k views
    • 
    • et pet
    • April 1, 2020

15. How to solve this?

    By GeorgeScott, February 10, 2019
    • 1 reply
    • 2k views
    • 
    • bluedot
    • March 29, 2020

16. fantasy idea

    By eino olavi!, January 9, 2020
    • 4 replies
    • 2.2k views
    • 
    • Phi for All
    • January 10, 2020

17. speed

    By eino olavi!, January 9, 2020
    • 1 reply
    • 1.4k views
    • 
    • swansont
    • January 10, 2020

18. New 11 Oct 2019

    By Commander, October 11, 2019
    • 1 reply
    • 2.2k views
    • 
    • HRassmy
    • November 12, 2019

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

    By Koni, October 30, 2019
    • 0 replies
    • 2.1k views
    • 
    • Koni
    • October 30, 2019

20. Can you find the Number ?

    By Commander, October 15, 2019
    • 6 replies
    • 2.3k views
    • 
    • Sensei
    • October 17, 2019

21. How many children ?

    By Commander, October 15, 2019
    • 4 replies
    • 1.6k views
    • 
    • Commander
    • October 16, 2019

22. Can You Find the Number? 1 2 3

    By Umurbaba, February 14, 2019
    • 62 replies
    • 10.2k views
    • 
    • Commander
    • October 15, 2019

23. A Simple Crossword !

    By Commander, October 15, 2019
    • 0 replies
    • 2.3k views
    • 
    • Commander
    • October 15, 2019

24. What is going on at 09:22 ?

    By Moontanman, August 8, 2019
    • 1 reply
    • 2k views
    • 
    • Roamer
    • August 22, 2019

25. Shortest Path ?

    By Commander, February 7, 2019
    • 3 replies
    • 2.7k views
    • 
    • Commander
    • July 14, 2019