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Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

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Thanks and enjoy the Den :-)
Guest Message by DevFuse

Toggle New Brain Teasers (User Submitted) New Brain Teasers (User Submitted)

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New Logic/Math Puzzles

They can be logical [e.g. honestans/swindlecants or hats on death row], math [e.g. probability, sequences], physics or geometry, especially where intuition might suggest wrong answer.

  • 13049 topics
  • 191598 replies
Segments on a line - last post by k-man

New Word Riddles

Inductive, intuitive, but still requiring some thought (eg. riddle of the sphynx, What-Am-I riddles, anagrams, Shakeepuddn's style, etc.)

  • 1218 topics
  • 24600 replies
What am I, by the numbers - last post by plainglazed

New Optical Illusions

Post amazing illusions you have seen on the web right here.

  • 29 topics
  • 203 replies

Other Mind Boggling Stuff On Web

Anything else on the web that is worth mentioning.

  • 20 topics
  • 133 replies
My facebook pages - last post by nuurhasan

Toggle Old Brain Teasers Old Brain Teasers

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Puzzles and Riddles (section closed)

  1. Logic Puzzles,
  2. Logic Problems,
  3. Water and Weighing Puzzles,
  4. Einstein's Riddles,
  5. Number Puzzles,
  6. River Crossing Puzzles,
  7. Puzzle Championship Teasers,
  8. Geometry/Dissection Puzzles,
  9. Matchstick Puzzles,
  10. Cryptograms and Algebra Puzzles

My favorite puzzles sorted in several subforums.

  • 171 topics
  • 6869 replies
Matchstick Equation - last post by hishanghai


The most famous paradoxes - liar paradox, barber paradox, doubtful existence of God, sentences from life, and sophisms.

  • 43 topics
  • 1890 replies
Think about these - last post by logiclover

Brain Games and Others

Hints and help from other visitors.

  • 22 topics
  • 66 replies
BrainTrainingApp.com - Brai... - last post by nuurhasan

Google Gadgets

Comments on 4 gadgets of mine - Brain Teasers, Puzzles & Riddles, Famous Optical Illusions and Chuck Norris Facts.

  • 2 topics
  • 44 replies
My Google Gadgets in Your L... - last post by Gana Yaswanth

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  1. Goodies,
  2. Baddies

Join mostly role playing games played over several days (eg. Mafia game).

  • 211 topics
  • 85519 replies
Akaslickster's Mafia DE... - last post by akaslickster

Homework Help

This forum is for homework HELP.
DO NOT do others homework for them.
DO NOT ask for others to do your homework for you.

  • 14 topics
  • 124 replies
Writing an Essay - last post by Kuch Marida


Do you know a good joke? One that is appropriate for kids as well? Share it with the world - post it right here.

  • 52 topics
  • 1801 replies
Math Lover? - last post by nuurhasan

Comments and Suggestions

Your feedback on what to improve and any questions regarding BrainDen.

  • 52 topics
  • 499 replies
​ Symbols appearing when... - last post by rookie1ja


Share your thoughts on anything else not mentioned in other categories (eg. you can discuss philosophy related questions).

  • 64 topics
  • 2900 replies
HNY! - last post by plainglazed

Introduce Yourself

If you want to say hello, share how you got here and what you are looking for in BrainDen forums, then this is the place to do it. One thread per member please.

  • 54 topics
  • 241 replies
Hi -- I've created a li... - last post by atorch

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