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, 07:33 PM
• In: The Burning Phoenix
• By: Cavenglok 

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, 05:47 PM
• In: Stop and Go
• By: EDM 

New Optical Illusions

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

• 05 March 2010 - 07:12 AM
• In: very interesting series of ...
• By: VAHID 

Other Mind Boggling Stuff On Web

Anything else on the web that is worth mentioning.

• Yesterday, 05:08 PM
• In: Math Contest
• By: JarZe 

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

• 08 March 2010 - 07:13 AM
• In: Gardens
• By: vee's brain 

Paradoxes

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

• Yesterday, 07:04 PM
• In: The shorter walk
• By: PhoenixFromTheFlames 

Brain Games and Others

Hints and help from other visitors.

• 09 February 2010 - 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.

• 06 March 2010 - 09:49 PM
• In: How many members found Brai...
• By: Cavenglok 

Games

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

Subforums:

1. Goodies
2. Baddies

• Today, 04:41 AM
• In: Redwall Mafia
• 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.

• 10 March 2010 - 04:06 PM
• In: TI-89 Titanium Help
• By: JarZe 

Jokes

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

• Yesterday, 12:20 AM
• In: Useless Inventions
• By: 24_65_34_83_361 

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).

• Today, 11:39 AM
• In: Don't you hate it when?
• By: octopuppy