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Toggle this category 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.

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New Word Riddles

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

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New Optical Illusions

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

  • 64 Topics
  • 1033 Replies
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Other Mind Boggling Stuff On Web

Anything else on the web that is worth mentioning.

  • 91 Topics
  • 1089 Replies

Toggle this category Old Brain Teasers

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Puzzles and Riddles

My favorite puzzles sorted in several subforums.

Subforums:
  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
  • 172 Topics
  • 6808 Replies
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Paradoxes

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

  • 52 Topics
  • 1599 Replies
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Brain Games and Others

Hints and help from other visitors.

  • 43 Topics
  • 135 Replies
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Google Gadgets

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

  • 6 Topics
  • 127 Replies

Toggle this category Miscellaneous

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Games

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

Subforums:
  1. Goodies
  2. Baddies
  • 304 Topics
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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.

  • 31 Topics
  • 278 Replies
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Jokes

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

  • 536 Topics
  • 4621 Replies
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Comments and Suggestions

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

  • 123 Topics
  • 964 Replies
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Others

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

  • 580 Topics
  • 13665 Replies

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