Brain Teasers and Puzzles

539 topics in this forum

1. Help Please!!

   By Guest roger_kang, May 20, 2005
   • 4 replies
   • 3207 views
   • 
   • OldChemE
   • Monday at 09:08 PM

2. A Simple Brain Teaser !

   By Commander, September 4
   • 1 reply
   • 150 views
   • 
   • Itoero
   • September 11

3. Can you solve this Ridle?

   By Marijn, August 30
   • 12 replies
   • 170 views
   • 
   • koti
   • August 31

4. Can you solve this puzzle?

   By oanacristina, July 27
   • 2 replies
   • 325 views
   • 
   • alpha to omega
   • August 28

5. Who am I?

   By dimreepr, July 14
   • 18 replies
   • 438 views
   • 
   • dimreepr
   • July 17

6. Two multiple choice questions

   By bradley55, January 23
   • 11 replies
   • 1040 views
   • 
   • J.C.MacSwell
   • July 4

7. Ciphered text test.

   By Tom O'Neil, November 3, 2016
   • 10 replies
   • 1312 views
   • 
   • Tom O'Neil
   • July 4

8. 13 BRAIN TEASERS TO MAKE YOU THINK HARD AND TO BOOST YOUR BRAIN POWER

   By ash9898, July 1
   • 0 replies
   • 265 views
   • 
   • ash9898
   • July 1

9. Who Works Where?

   By Spiri.Of.Genius, January 16
   • 4 replies
   • 806 views
   • 
   • NNY
   • June 16

10. Master of the Magic Squares !

    By Commander, June 13, 2017
    • 9 replies
    • 1856 views
    • 
    • Amit Walker
    • May 1

11. Cheryl's Birthday

    By Spiri.Of.Genius, January 15
    • 3 replies
    • 688 views
    • 
    • TakenItSeriously
    • March 30

12. Real Test Of Genius

    By Spiri.Of.Genius, January 14
    • 4 replies
    • 553 views
    • 
    • TakenItSeriously
    • March 30

13. very fast drone

    By Itoero, March 24
    • 4 replies
    • 304 views
    • 
    • Itoero
    • March 24

14. Horse-sense

    • 1
    • 2

    By Tub, February 19
    • 26 replies
    • 1532 views
    • 
    • Hypsibius
    • March 22

15. Turtle Soup.

    • 1
    • 2

    By LastHit, July 27, 2013
    • 34 replies
    • 11331 views
    • 
    • Hypsibius
    • March 20

16. round peg and square hole

    By Strange, March 11
    • 0 replies
    • 551 views
    • 
    • Strange
    • March 11

17. Riddle

    By DanTrentfield, January 17
    • 1 reply
    • 481 views
    • 
    • alchimie
    • January 24

18. 2 Riddles

    By bradley55, January 23
    • 2 replies
    • 325 views
    • 
    • Lord Antares
    • January 23

19. Test of an Examiner

    By Spiri.Of.Genius, January 11
    • 3 replies
    • 421 views
    • 
    • swansont
    • January 14

20. high jump+roll

    By Itoero, December 15, 2017
    • 3 replies
    • 579 views
    • 
    • J.C.MacSwell
    • January 3

21. Missing Number

    By Adam Gameston, December 18, 2017
    • 2 replies
    • 536 views
    • 
    • OldChemE
    • December 23, 2017

22. Tire spots

    By Butch, September 28, 2017
    • 5 replies
    • 865 views
    • 
    • Butch
    • November 2, 2017

23. Possibility to survive a building jump?

    • 1
    • 2
    • 3

    By LabRat1, July 25, 2017
    • 54 replies
    • 2989 views
    • 
    • Itoero
    • October 10, 2017

24. If we can drink a drink why can't we food a food?

    By HiMyNameIs......, July 16, 2017
    • 14 replies
    • 1547 views
    • 
    • Delta1212
    • July 29, 2017

25. The Overcrowded Prison

    • 1
    • 2

    By GeniusIsDisruptive, July 10, 2017
    • 42 replies
    • 2650 views
    • 
    • swansont
    • July 23, 2017