It's mind-boggling . . . It's addictive . . . It's SUDOKU MANIA Solving Sudoku number puzzles demands no mathematical skills. All you need to have is a good sense of logic, a love of game-playing, and a whole lot of patience! If you have not yet discovered Sudoku, you'll be playing like a pro in no time. If you -- like millions of other Americans -- are already hooked on the game, SUDOKU MANIA will provide further hours of challenging fun Brown Belt Puzzles 91-96

Thirty entertaining, challenging mazes: 3-D constructions, directional arrows, designated stops, and more. From easy "No Brainers" to "Full Brain Overload," which might take hours to solve. Includes "hints section."

Treasury of 300 puzzles features 3D and chess puzzles, connections, dissections, foldings, geometrical and number puzzles, logic problems, matchstick puzzles, mazes, moving pieces, put-togethers, strimkos, sudoku, and visual and word puzzles.

Invites youngsters to find ten or more differences between slightly changed versions of the same photograph of everyday activities, groups of objects, and other scenes.

Multiplying my age by 6 then subtracting 6 produces the same result as subtracting 7 from my age then multiplying by 7. How old am I? On my broken calculator with keys + - ÷ x =, the only functional number is 7. How can I get 34 to appear in the readout? A country mints four denominations of coins, in whole numbers of cents. It takes four of these coins to make 21¢, or 24¢, or 25¢, or 26¢. What are the denominations of the coins? These and almost 300 other mathematical puzzles appear in this original collection, devised by world-renowned mathematicians, puzzle creators, and devoted puzzle lovers. A unique puzzle project, it unites the efforts of a dozen authors, including software engineer Andrea Gilbert and Bram Cohen, author of the P2P BitTorrent protocol. Seventeen different types of challenges include 3-D puzzles, chess puzzles, connections, dissections, foldings, geometrical puzzles, logic problems, matchstick puzzles, mazes, moving pieces, number puzzles, put-togethers, strimko, sudoku, visual puzzles, weightings, and word puzzles. The difficulty level of each puzzle is marked by stars, ranging from 2 to 5. Average difficulty level is about 3 stars, promising puzzle enthusiasts many entrancing hours of solving and enjoyment.

Dozens of intriguing puzzles pose and answer interesting questions based on world history, geography, popular culture, and many other subjects. Alphabet and number codes, picture puzzles, and more, suitable for ages 8–11. Solutions.