Brain Teasers are mentally challenging puzzles (often in the form of a question or story) that can be solved by applying logic or other mental skills.
Easy, medium and difficult brain teasers without answers.
Collection of logic problems to solve. Printable.
Recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, optical illusions, and curiosities.
A collection of visual and linguistic riddles.
Brain teasers, riddles, logic puzzles and problems, paradoxes, optical illusions, IQ tests and logical games.
Brain teasers, puzzles, riddles, games and optical illusions.
A collection of math, logic, and word puzzles.
Includes a huge collection of user submitted and rated brain teasers and riddles. It also has a message board and some unique multi-player games.
Paradoxes, puzzles, games, optical illusions, poetry, curious facts, and quotations.
Weekly puzzles and archives.
A community based site with competitions, challenges, awards, a help centre, forums and games.
Challenge your mind with free online riddles/puzzles, logic games, brain teasers and view optical illusions.
Riddles, illusions, puzzles, and brain teasers.
Crosswords and other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searchable list.
Over 60 brain teasers to enhance your mind.
An on-line puzzle story in twelve weekly installments.
Have fun with games, puzzles, brainteasers and humor as you learn about logic and analysis.
Some real mind benders here.
Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly.
Pascal Huybers presents information about a variety of different puzzles.
Free, updated, original abstract puzzles for advanced puzzle-solvers. Includes current unsolved puzzle and archive with hints and solutions.
A collection of logic puzzles, riddles and brain teasers.
An archive of many popular puzzles from the rec.puzzles newsgroup.
Collection of visual brain teasers which can be solved by saying what you see.
Answers to technical interview questions, programming problems, and brain teasers.
A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing "unsolved puzzle" plus three years worth of previous puzzles.
Collection of logic problems, logic puzzles and cryptograms with answers. Graded levels of difficulty including some especially for kids.
Recreations for active minds including games, puzzles, math, words, images, books, software and web guide.
Word puzzles, riddles, rebuses, brain teasers, mazes, cliparts and pictures.
Collection of puzzles including riddles, logic puzzles and sequential puzzles.
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