Recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, opt...
Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests mont...
A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing "unsol...
Crosswords and other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searcha...
Includes a huge collection of user submitted and rated brain teasers and riddles. It also has a mes...
Challenge your mind with free online riddles/puzzles, logic games, brain teasers and view optical i...