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.

• Yesterday, 11:50 PM
• In: Words from Numbers
• By: xamdam 

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, 05:41 AM
• In: even more made up "what...
• By: moocowaj 

New Optical Illusions

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

• 06 February 2010 - 09:01 AM
• In: Can you find it?
• By: mojobrain 

Other Mind Boggling Stuff On Web

Anything else on the web that is worth mentioning.

• 25 January 2010 - 12:51 AM
• In: How small are we?!
• By: brain storm 

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

• Yesterday, 10:50 PM
• In: No. 4
• By: jerew 

Paradoxes

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

• Yesterday, 08:03 PM
• In: Crocodile Sophism
• By: ylayali 

Brain Games and Others

Hints and help from other visitors.

• Today, 01:21 AM
• In: Triogical level 33 : Chambe...
• By: zuggzwang 

Google Gadgets

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

• 27 November 2009 - 12:19 AM
• In: Chuck Norris Facts
• By: kingofpain 

Games

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

Subforums:

1. Goodies
2. Baddies

• Today, 04:11 AM
• In: Rock Paper Scissors Algorit...
• By: phillip1882 

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.

• 06 February 2010 - 04:16 AM
• In: Understanding physics
• By: harvey45 

Jokes

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

• 07 February 2010 - 12:28 AM
• In: oh, my!
• By: teekayla 

Comments and Suggestions

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

• 07 February 2010 - 06:04 PM
• In: Signature problems
• By: rookie1ja 

Others

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

• Yesterday, 10:07 PM
• In: some math fun
• By: unreality