Brain Teasers Forum: Brain Teasers Forum

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.

• Today, 12:21 AM
• In: Interleaving strings with o...
• By: superprismatic 

New Word Riddles

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

• Today, 12:12 AM
• In: Simplicity......
• By: DudleyDude 

New Optical Illusions

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

• 11 November 2009 - 05:06 PM
• In: simple illusion
• By: RABBI BURNS 

Other Mind Boggling Stuff On Web

Anything else on the web that is worth mentioning.

• 15 November 2009 - 10:40 PM
• In: When Succeeding Fails
• By: akaslickster 

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

• 19 November 2009 - 11:18 PM
• In: 6x4 Rectangle
• By: Muslim 

Paradoxes

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

• Yesterday, 07:21 AM
• In: Barber Paradox (Russell's P...
• By: pratz 

Brain Games and Others

Hints and help from other visitors.

• 10 October 2009 - 07:50 PM
• In: Soukoban level 12- help I...
• By: deeko 

Google Gadgets

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

• 13 November 2009 - 11:26 PM
• In: Chuck Norris Facts
• By: Jubjub 

Games

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

Subforums:

1. Goodies
2. Baddies

• Today, 01:57 AM
• In: Scooby-Doo Where are They! ...
• By: crazypainter 

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.

• 17 November 2009 - 08:13 PM
• In: List of Homework Helpers
• By: EDM 

Jokes

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

• Today, 01:42 AM
• In: Now THAT is a stupid law!
• By: harvey45 

Comments and Suggestions

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

• 09 November 2009 - 12:12 PM
• In: Name Change
• By: rookie1ja 

Others

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

• Yesterday, 07:52 PM
• In: Evidence and reason
• By: Semper Rideo