Brain Teasers

• Cryptograms
• Lateral Thinking Puzzles
• Mathematical
• Riddles
• Sudoku

• 2Play.com's Rebus  - Free browser-based rebus game with thirty five levels to clear.
• A Fun Zone  - Features daily games, brain teasers, and puzzles. Also provides games for downloading or online playing.
• A Game A Day  - Collection of educational and entertaining puzzles for children.
• Able2Know  - Compiles fan-made riddles and brain teasers of various genres.
• Abnorm's Conundrums  - Collates various brain teasers of different levels that have no definite answers.
• All-Star Puzzles: Logic Problems  - Features printable logical problems. Puzzles are arranged alphabetically, difficulty, and popularity.
• The Amazing Art Site  - Archives collections of optical illusions, hidden images, and ambiguous art.
• Archimedes' Lab  - Offers a variety of brain teasers, optical illusions, e-books, and games available for play online.
• AVAV  - Features links to different optical illusions, brain teasers, and riddles. Also presents resources.
• Barry Is Puzzled  - Features brain teasers and logic, math, and creative thinking puzzle games.
• Bill's Brain Teasers  - Provides several brain teasers along with their answers.
• Blifaloo.com  - Collection of brain stimulating quizzes, games, activities, puzzles, optical illusions, and magic tricks.
• Brain Candy  - Collection of riddles, wordplay, jokes, insults, and mind games.
• Brain Games  - Play free puzzles online for brain teasers, brain training, and word searches.
• Brain Games  - Features a variety of puzzle, riddle, logic, math, pattern, and probability games.
• Brain Teasers  - Presents a collection of riddles, geometrical problems, mathematical paradoxes, and optical illusions.
• Brain Teasers from PedagoNet  - Large collection of brain teasers complete with solutions.
• Brain Training 101  - Offers brain training articles, reviews and news as well as a free selection of brain games.
• BrainBall  - Features different games to assess thinking and logical skills. Provides statistical reports.
• BrainBashers  - Collection of brain teasers, puzzles, riddles, games and optical illusions.
• BrainBoggled!  - Includes brain teasers, logic puzzles, math riddles, and more.
• Braindash  - Collection of online trivia, puzzle, and brain games. Offers cash prizes to winners.
• Brain-Fun.com  - Offers a collection of free online brain teasers, puzzles, and math and logic games.
• Braingle  - Offers a collection of brain teasers with a featured daily riddle, online games, and member message boards.
• Brainist.com: Brain Games  - Features a selection of brain games involving memory, math, mnemonics, strategy, trivia, riddles, logic, and puzzles.
• Catfishing  - Guessing game that makes use of information from Wikipedia articles.
• Confusion  - Features a puzzle with 6 levels to measure thinking skills and logical abilities.
• The Contest Center  - Offers cash prizes for solving brain teasers and puzzles.
• Curiouser.co.uk  - Showcases paradoxes, illusions, and trivia collections.
• Dual N Back  - Game that purports to train the player's brain and improve intelligence.
• Eluzions  - Features assorted puzzle games, optical illusions, and trivia collections on various categories.
• Eyetricks: Brain Teasers  - Archives of brain teasers, puzzles, and IQ tests.
• Games for the Brain  - Offers a variety of math, logic, and word games. Includes tips on activities that help brains function better.
• Gray Watson's Brain Teasers and Riddles  - Provides solutions and randomization features of the puzzle collections.
• The Grey Labyrinth  - Showcases the illustrations of puzzles, riddles, and paradoxes. Also provides gaming resources and solutions.
• Lumosity  - Provides targeted brain games and brain training exercises available in free and for-a-fee versions.
• National Geographic Memory Game  - In conjunction with the TV series "Brain Games", this puzzle tests your ability to memorize numbers, letters and photographs in a particular order.
• Play with Your Mind  - Features a variety of brain games and exercises, mind puzzles, and memory workout activities.
• Puzzlemix  - Features free online Sudoku, Hanjie, Kakuro and other puzzles created by Dr. Gareth Moore. Includes rules and discussion forum.
• Sporcle  - Collection of mind stimulating diversions including riddles, games, and trivia. View games by rating, length, tags, and difficulty.