See also:
- Able2Know - Message board of user submitted riddles and brain teasers.
- Abnorm's Conundrums - Easy, medium and difficult brain teasers without answers.
- All-Star Puzzles: Logic Problems - Collection of logic problems to solve. Printable.
- Alphabet Cartoon Puzzles - Letters of the alphabet are used as structural components for drawings of figures and faces. Spelling tips lead to the solution of the puzzles.
- The Amazing Art Site - Huge collection of optical illusions, hidden imagery, ambiguous art and upside downs.
- Analytical Puzzles - List of logic puzzles grouped by difficulty.
- Archimedes' Laboratory - Recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, optical illusions, and curiosities.
- AVAV - Collection of optical illusions, brain teasers and riddles.
- Bill's Brain Teasers - A collection of visual and linguistic riddles.
- Brain Juice - An assortment of entertaining logic puzzles with solutions and indicated levels of difficulties.
- Brain Teaser World - Offers riddles, puzzles, optical illusions, and magic tricks.
- Brain Teasers - Brain teasers, riddles, logic puzzles and problems, paradoxes, optical illusions, IQ tests and logical games.
- BrainBall - A daily brain puzzle with 10 different tasks and a variety of statistics on your performance.
- BrainBashers - Brain teasers, puzzles, riddles, games and optical illusions.
- BrainBoggled.com - A collection of math, logic, and word puzzles.
- Braingle - Brain Teasers & Riddles - Contains a huge collection of user submitted and rated brain teasers and riddles. It also has a lively message board and some unique multiplayer games.
- BrainVista - Collection of solved and unsolved brain teasers.
- Confusion - Its a challenge to reach the end of this puzzle maze.
- Curiouser.co.uk - Paradoxes, puzzles, games, optical illusions, poetry, curious facts, and quotations.
- Eluzions - Featuring all sorts of games, optical illusions, puzzles, trivia, mazes, and magic tricks. Suitable for all ages.
- Eye-Pleasing, Mind-Teasing 3-D Conundrums - Scans from a book of puzzles, includes English translations.
- Eyetricks: Brain Teasers - Weekly puzzles and archives.
- A Game A Day - A puzzle site featuring a new puzzle format each weekday for each month. Puzzles are fun, educational, entertaining and are also printable.
- Game-Master's Page - Riddles, games, cryprograms, math puzzles, and forums.
- Gray Watson's Brain Teasers and Riddles - A collection of brain teasers and riddles with a guess button.
- The Grey Labyrinth - A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing "unsolved puzzle" plus three years worth of previous puzzles.
- Had To Play On - A community based site with competitions, challenges, awards, a help centre, forums and games.
- iRIDDLER - Challenge your mind with free online riddles/puzzles, logic games, brain teasers and view optical illusions.
- Just Riddles and More - Riddles, illusions, puzzles, and brain teasers.
- Logic Puzzles Escapades - Logic puzzles with a satirical New Zealand tone.
- The Logic Zone - Collection of problems with answers, logic puzzles and cryptograms.
- National Puzzlers' League - Crosswords & other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searchable list.
- PedagoNet Brainers - Over 60 brain teasers to enhance your mind.
- Planetarium - An on-line puzzle story in twelve weekly installments.
- Professor Tangent - Have fun with games, puzzles, brainteasers and humor as you learn about logic and analysis.
- Puzzability - Some real mind benders here.
- Puzzle Contest Center - Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly.
- A Puzzlemakers Site - Puzzles of all descriptions.
- Puzzles Without Rules - Free, updated, original abstract puzzles for advanced puzzle-solvesr. Includes current unsolved puzzle and archive with hints and solutions.
- Pzzls - A collection of logic puzzles, riddles and brain teasers.
- Rec.puzzles Archive - An archive of many popular puzzles from the rec.puzzles newsgroup.
- Roh'El's Riddles - Offers brainteasers rated by difficulty and category.
- Say What You See! - Collection of visual brain teasers which can be solved by saying what you see.
- Sesquip Word Games - Challenging word games published in newspapers.
- Shashi's Homepage - Collection of puzzles, riddles and brain teasers.
- The Stone - an online mystery game. Hours of clever puzzles and riddles. Puzzles challenge the mind of serious and amateur players worldwide.
- Thinking Game Forums - Chat and discussion about online thinking games.
- Unitix Entertainment - Online games, puzzles and other interactive brainteasers. Fun for all ages.
- Word Juxtapoz - Word puzzles, riddles, rebuses, brain teasers, mazes, cliparts and pictures.
- Zuzzle Puzzles - Collection of puzzles including riddles, logic puzzles and sequential puzzles.
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