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.

New Word Riddles

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

New Optical Illusions

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

Other Mind Boggling Stuff On Web

Anything else on the web that is worth mentioning.

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.

Paradoxes

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

Brain Games and Others

Hints and help from other visitors.

Google Gadgets

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

Games

1. Goodies,
2. Baddies

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

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.

Jokes

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

Comments and Suggestions

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

Others

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

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.