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Containing over 100 exercises, Number Enigmas challenges even the cleverest number crunchers. For fun or for sport, these puzzles are perfect for car trips or airplane rides or even to find out who is the real puzzle wizard in the family. Puzzlers used to those old-fashioned black-and-white enigmas will be happy to move up to this techno-colorful puzzle book.
Are you sharp enough to solve these devious mind-bogglers? These diverting number, geometric, logic, analytical, and story problems--which vary in difficulty from pleasantly puzzling to chew-your-pencil challenging--will test your smarts. Math conundrum connoisseurs will treasure this collection, and everyone who loves a good puzzle will feel a sense of accomplishment by the end of the book.
Here is a puzzle book that will have even the masters begging for mercy--and for more. Almost Impossible Number Puzzles has more than 275 puzzles offering a variety of challenges including Sudoku and Kakuro. It's a perfect take-along for brave men and women. CAUTION: Almost Impossible Number Puzzles may strain the brain and induce pleasure.
Collection of number puzzles. There are logic problems, mathematical puzzles, matrix problems, series puzzles, and many more besides.
Test your powers of logic and mental agility with this mixed collection of 500 number and logic puzzles from the MindGames section of the Times. Puzzles include the favorites Suko, Brain Trainer, Cell Blocks, Futoshiki, Kakuro, Set Square, and KenKen. The perfect gift for all number and logic puzzle enthusiasts.
If you love number-based puzzles, this book will challenge you and provide hours of entertainment. Number fill-ins are solved through logic and process of elimination (no math involved), and are great for improving your powers of concentration. Includes over 80 puzzles. Puzzle grid on left page and number list on right, for plenty of room to work the puzzles. Includes answer key in the back of the book. Spiral-bound 192 pages
Totally Brain-Busting Number Puzzles has over 100 perplexing puzzles including counting puzzles, Sudoku puzzles and so much more!
In Japan, where the written language is highly complex and context-dependent, number puzzles are the people's puzzle of choice. Many of the puzzles in this book are unheard of in the U.S., but are established, proven classics in Japan. This challenging collection contains more than 350 logic, sequence and mathematical puzzles, including well-known favorites (Sudoku, Kakuro), many new puzzle types (Battleships, Number Position, Nonogram), or variations on known themes (Killer Sudoku, Latin Squares). Japanese Number Puzzles is packed with all kinds of brain-bogglers — over 350 of them in fact, and you're guaranteed top-quality challenging problems on every page. From Sudoku and Kakuro to Battleships and Arithmetic Squares, each puzzle requires logical thinking and, in some cases, a certain amount of mathematical knowledge. What's more, anyone having problems solving the puzzles needn't resort to banging their head against a brick wall. Full explanations of how to solve each puzzle type is given, as are the all-important answers.
If you've got a knack for math, these puzzles will add up to a whole lot of fun. The five challenging tests each contain the same types of grids and shapes, so you'll soon become familiar with them, but some are easy while others require a bit more thought.
Algorithmic puzzles are puzzles involving well-defined procedures for solving problems. This book will provide an enjoyable and accessible introduction to algorithmic puzzles that will develop the reader's algorithmic thinking. The first part of this book is a tutorial on algorithm design strategies and analysis techniques. Algorithm design strategies — exhaustive search, backtracking, divide-and-conquer and a few others — are general approaches to designing step-by-step instructions for solving problems. Analysis techniques are methods for investigating such procedures to answer questions about the ultimate result of the procedure or how many steps are executed before the procedure stops. The discussion is an elementary level, with puzzle examples, and requires neither programming nor mathematics beyond a secondary school level. Thus, the tutorial provides a gentle and entertaining introduction to main ideas in high-level algorithmic problem solving. The second and main part of the book contains 150 puzzles, from centuries-old classics to newcomers often asked during job interviews at computing, engineering, and financial companies. The puzzles are divided into three groups by their difficulty levels. The first fifty puzzles in the Easier Puzzles section require only middle school mathematics. The sixty puzzle of average difficulty and forty harder puzzles require just high school mathematics plus a few topics such as binary numbers and simple recurrences, which are reviewed in the tutorial. All the puzzles are provided with hints, detailed solutions, and brief comments. The comments deal with the puzzle origins and design or analysis techniques used in the solution. The book should be of interest to puzzle lovers, students and teachers of algorithm courses, and persons expecting to be given puzzles during job interviews.