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Old Brain Teasers


Subforums

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.

  • 171 topics
  • 6869 replies
Matchstick Equation - last post by hishanghai

Paradoxes

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

  • 42 topics
  • 1880 replies
Unstoppable Force/Immovable... - last post by Kikacat123

Brain Games and Others

Hints and help from other visitors.

  • 19 topics
  • 64 replies
Brain game from computer sc... - last post by antipope

Google Gadgets

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

  • 2 topics
  • 44 replies
My Google Gadgets in Your L... - last post by Gana Yaswanth