BrainDen.com - Brain Teasers

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## Popular Content

Showing content with the highest reputation since 04/16/20 in Posts

1. ## Harder hats on deathrow version

I assume that they also all get the clue that their numbers are unique.
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2. ## impossible result

i cant for the llfe of me find the flaw with his logic. somewhere between factoring each polynomial and the step before is wrong. but i see no mistake.
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3. ## I got stuck in brain test 2 game

Hi there, I got stuck in brain test 2 game, where can I see the answers for all levels of this game? I want it to be up to date and all the levels have been solved so that I can see the answer wherever I get stuck. thanks.
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4. ## Similarities or Coincidence

Quick question what is the difference between prophets and psychics (that use intuition as their "mode of operation")?
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7. ## Monk and the mountain

A monk started out at 7:00 am at the bottom of the mountain and climbed to the top arriving at 7:00 pm He prayed all thru the night and at 7:00 am started down the mountain arriving at the bottom at 7:00 pm. Is there a point on the mountain trail where the monk was at the same time going up and coming down Proof please
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10. ## Has anyone done a puzzle post?

Hi all, I've created a puzzle based game at PuzzlePost.uk that can be sent as a gift in the post - it might be useful for those who haven't been able to see friends and family for a while. It contains a range of puzzles to test various different aspects of your thinking. I hope you like it. Thanks, Will
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11. ## 10201 poker cases and 2 scales

Hi, this is a riddle I just created. Sorry for my broken English, it's not my native language. There are two version of almost the same idea. The 1st one is purest, but the second one is more tricky. I think it's quite difficult to solve, but there is no need for any mathemical knowledge. First version of the riddle A poker manufacturer has created 10201 cases each containing 100 chips. (Note: 10201=101*101) 10200 of these cases are perfect and each of their chips weighs 10g. One of these cases is defective and its 100 chips weigh 11g each. In order to determine which of the 1020
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12. ## Two boys problem

Hi Nemesis. As it has been verified that one of the two dogs is a male, the only probability for the other also being a male is that both are males, as given by the remaining three equally likely possibilities (1,2,3). As both 2 and 3 are invalid, 1 is the only valid result.
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13. ## Groundhog in a Hole - Yet Again

You got it. Well done. I'll post my solutions later.
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16. ## mostly cryptic URL riddle game (help?)

Hello, ive just made this account cause im desperate and need help with a riddle/puzzle i've been sitting on for a few days now, and i cant figure out the solution for the life of me. the game is: testoffailure (if you wanna try it youself go ahead its fun) it is a URL based riddle which means you enter the answer of the puzzle on any given page in the URL and it takes you to the next page/puzzle (so /answer.html) The page um stuck on is this one (dont click if you dont wanna give it a try yourself) id be so thankful if anyone could help me figure this out. the answers are mostly
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17. ## Photochromism 326 BC

I sort of hesitate to relay a tongue in cheek report I read a while back that photochromic materials are not of recent discovery, but were actually known back in the time of Alexander the Great. A black substance could be ground into powder and dissolved in water. Alexanderâ€™s troops would soak strips of cloth torn from their togas in this solution and tie them around their wrists. As the sun rose, traversed the sky and then set, the treated cloth would change color, and by glancing at them his men could tell the approximate time of day. They called it Alexanderâ€™s Rag Time Band.
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18. ## HTML help

I am attempting to develop a website for a university project where I am supposed to create a quiz that stores the users name and answers then decides if the answers are sufficient for mastery. If the student does well enough then a 'certificate' is printed to the screen for the user to print out their recognition. If they do not then it reports back their answers so that the student knows to go back and study. The problem is, is that we are supposed to build this website in google sites. i have little qualms with google sites for the project is almost complete except for the fact that
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19. ## Walking, running, driving, waiting

With a tip of the hat to @BMAD for his interesting puzzle. For your amusement, here's an interesting spin on this genre: One night you encounter a two-hour traffic delay due to an accident (the tow truck had difficulty clearing the road.) So, for a time interval 13 of two hours you were constrained to travel at 0 mph. You called home and said, sorry dear, but I'll be two hours late getting home. The next night, for some unimaginable reason, you were also constrained to travel part of the way at 0 mph, this time for a distance of one inch. What do you say now when you call hom
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20. ## Move one matchstick to fix the equation (2 solutions)

(copied from www.games4brain.com blog)
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21. ## Brain Teaser help needed ... Beat The Clock 1950s TV show ... balls and smoking pipes

I was cruising the TV and I came across the Beat The Clock TV show from 1950s. There was a challenge That looked like this:Two small ballsEach on its own 18" string suspended from a wooden barThe balls were 18" apart.You had to put 2 smoking pipe in your mouthYou couldn't use your hands after you put the pipes in your mouth.The ball rested on top of the hole, but did not go in.You had to get one ball in each of the smoking pipesHow do you do it?It wasn't solved on the show I watched.Now, if you get the first ball in and then try for the second, the ark of first ball means you couldn't get to t
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23. ## Brain Training App

Hi everyone, I have just launched a site that focuses on Brain Training via visual Puzzles, Brain Teasers, Riddles etc. There are multiple games on the platform and more are on their way, you can visit the site here: Brain Training App And please do not forget to play our latest game Multiplication Madness. And lastly, please do visit our blog: www.braintrainingapp.com/blog Any feedback, criticism, praises, suggestions and I am all ears Thanks! Regards, Nuur
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24. ## Crazy Circle Illusion!

Crazy Circle Illusion!
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25. ## HTML help

HTML alone is not enough to create website that evaluates correct quiz answers as far as I know. You would need some scripts for that. Or you could use easy online solutions which help you to create the quiz without coding: http://www.surveymonkey.com/ http://polldaddy.com/
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27. ## Soukoban level 34

as already mentioned, screen prints would help
1 point
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