Collected over several years by Peter Winkler, of Bell Labs, dozens of elegant, intriguing challenges are presented in Mathematical Puzzles. The answers are easy to explain, but without this book, devilishly hard to find. Creative reasoning is the key to these puzzles. No involved computation or higher mathematics is necessary, but your ability to construct a mathematical proof will be severly tested--even if you are a professional mathematician. For the truly adventurous, there is even a chapter on unsolved puzzles.

A NEW TWIST ON A POPULAR PUZZLE CUBE! Invented by Piet Hein, the Soma cube is one of the most famous mechanical puzzles in the world. The traditional challenge and outcome is to build a cube or other structures from all seven pieces.CHANGE THE RULES, CHANGE THE OUTCOME! The puzzles in this unique Soma-inspired collection are no longer predicated upon using all seven pieces at one time! By varying the number of pieces, there are many new and versatile puzzle challenges, from all types of recreational mathematics fields. For example, you will find symmetry puzzles, cover-up puzzles, and even fraction puzzles. The chapters are divided according to the number of pieces used; from single-piece puzzles to puzzles requiring a complete set.WHY USE THE SOMA CUBE? From the moment our creative team changed their rules of engagement for this new collection, the potential puzzle challenges and their solutions became nearly limitless! There is something magical and enchanting in those seven pieces that enabled us to find many puzzles and challenges!NEW CHALLENGES Most of the puzzles demonstrated within the book are original. Some are based on classic puzzles, as well as more modern ones, modified and presented by using the set of Soma pieces.LOW COST AND HIGH INTEREST FOR HOURS OF ENTERTAINMENT WITH INCREASING COMPLEXITY! This is a unique collection of puzzles - all you need is a set of the Soma cube. The puzzles range from easy to difficult and they appeal to a wide audience - all within the reach of the general public. It presents many geometrical and mathematical principles, and makes them easier to understand. However, no special knowledge in mathematics or geometry is required.

Challenge your brain at home with these enjoyable puzzles. 100 puzzles from The Times adapting the cryptic puzzle for those with a hectic lifestyle and schedule. Ideal for those starting out with cryptic crosswords, and those who'd like to tackle the main puzzle but feel daunted, or who can perhaps only solve a handful of clues. Appearing Monday to Friday in the puzzle pages of Times2, this crossword has a reduced 13x13 grid size and reduced difficulty too, the intention being to encourage people to take their first steps in tackling cryptic crosswords. And also to cater for those of us who have limited time to devote to our favourite pastime and need a ready-made set of puzzles that is solvable in a short space of time.

A massive 300 sudoku puzzles packaged in a stylish paperback - this is the perfect sudoku gift book for adults of any age. With a mix of 100 easy, 100 medium and 100 hard puzzles, the 9 x 9 grids are each arranged on their own page and solutions are easily found in the back of the book. Printed in a highly portable format, the book can be taken on your travels or sit neatly on your bedside table.

A NEW TWIST ON A POPULAR PUZZLE CUBE! Invented by Piet Hein, the Soma cube is one of the most famous mechanical puzzles in the world. The traditional challenge and outcome is to build a cube or other structures from all seven pieces.CHANGE THE RULES, CHANGE THE OUTCOME! The puzzles in this unique Soma-inspired collection are no longer predicated upon using all seven pieces at one time! By varying the number of pieces, there are many new and versatile puzzle challenges, from all types of recreational mathematics fields. For example, you will find symmetry puzzles, cover-up puzzles, and even fraction puzzles. The chapters are divided according to the number of pieces used; from single-piece puzzles to puzzles requiring a complete set.WHY USE THE SOMA CUBE? From the moment our creative team changed their rules of engagement for this new collection, the potential puzzle challenges and their solutions became nearly limitless! There is something magical and enchanting in those seven pieces that enabled us to find many puzzles and challenges!NEW CHALLENGES Most of the puzzles demonstrated within the book are original. Some are based on classic puzzles, as well as more modern ones, modified and presented by using the set of Soma pieces.LOW COST AND HIGH INTEREST FOR HOURS OF ENTERTAINMENT WITH INCREASING COMPLEXITY! This is a unique collection of puzzles - all you need is a set of the Soma cube. The puzzles range from easy to difficult and they appeal to a wide audience - all within the reach of the general public. It presents many geometrical and mathematical principles, and makes them easier to understand. However, no special knowledge in mathematics or geometry is required.

Fuel your passion for puzzles with the Daily Mail Big Book of Cryptic Crosswords 2, the second title in the new series of the best-selling bumper cryptic crossword puzzles from the nation's favourite newspaper. Whether you're a beginner or a puzzle expert, this collection of over 200 addictive puzzles will keep you entertained for hours on end.

Festive fun for all the family! Do you know… • Which band has had the most Christmas number ones? • How many cover versions of ‘All I Want for Christmas’ have been recorded? • Which Christmas song is the most popular single ever released? Can you… • Identify a classic Christmas song from a line sung backwards? • Fill in the blanks of iconic Christmas film lines? • Guess the Christmas film from the critic’s review? Get ready to beat your friends and family in a game of festive charades, discover the joys of Christmas-song Mad Libs, test your competitive side with a game of Who’s in Santa’s Bag?, have a good old-fashioned Rockin’ Robin team quiz, indulge in some merry drinking games; or escape with a Jollyword Puzzle. You’ll soon have Christmas all wrapped up! You’ll find hours of festive fun inside to make sure everyone has a very Holly Jolly Christmas!

Do you feel like you've solved enough traditional Sudoku, crosswords and logic problems to last a lifetime? Thinh Lai's Puzzle Universe is the second book in an exciting new series for everyone who loves puzzles and wants something fresh! Vietnamese puzzle master Lai Van Duc Thinh has created a series of original puzzle types sure to test the skills of even the most experienced puzzle-solver. Creatively stimulating new puzzles include Bar Code, Elbow Room, Boxing Match, Borderlands and more, each of which come with full instructions on how to solve them, as well as a variety of difficulty levels to aid in your progression.

Test yourself against the best with crosswords from the world's most popular puzzle tournament, presented by crossword legend Will Shortz. Will Shortz Games: Championship Crosswords features 60 puzzles from the beloved American Crossword Puzzle Tournament, the oldest and largest crossword competition. Can you complete these tricky grids faster than the country's top solvers? Use the scoring guide to rate yourself against the winning times. This volume is packed with fun facts, expert solving tips, photos, and wickedly tricky puzzles created by an all-star list of crossword creators. Whether you are a die-hard crossword enthusiast or an aspiring puzzler, this book will help you hone your wordplay skills and become a better solver. Features: Easy-to-highly challenging championship grids Brain-melting rebuses, punny wordplay, and themed puzzles Crosswords with scoring guide so you can recreate tournament-style play at home Complete answer key

Discover the wonders of the paranormal with this collection of spellbinding puzzles and brain-training activities, here to focus your mind and inspire creativity Immerse yourself in all things mystical with this assortment of pleasing puzzles and calming conundrums, guaranteed to bewitch and enchant you. From white witchcraft and secret symbols to rituals and runes, the enigmas in these pages will take you on an expedition through the mystical world. Featuring a huge range of puzzles, games and activities for you to enjoy, this treasury of brain-training teasers will help you engage your mind and find peace in your day. Inside you will find: A varied selection of puzzles, including crosswords, word searches, word ladders, anagrams, sudokus, spot-the-differences, acrostics and more Mindful activities to help you relax, such as colouring pages and mazes A selection of enchanting affirmations to awaken your imagination and inspire creativity Stimulate your mind and unlock the secrets of the magic world as you embark on this spellbinding journey.

Really, Mr. Collins,' cried Elizabeth with some warmth, 'you puzzle me exceedingly...' - Pride and Prejudice. Enter the world of Pride & Prejudice & Puzzles, a beautifully realised puzzle collection that transports you to Jane Austen's England - a land of polite intrigue and conjugal contrivance. Permit yourself the indulgence of an interval of recreation and amusement to make your acquaintance with the riddles and conundrums contained within; for you are sure to receive no inconsiderable pleasure from the puzzling over and resolving of them. Your quest for an amiable distraction will be over, leaving your curiosity entirely satisfied. Puzzles there are plenty, clues there are many, and the pages are handsomely decorated with fine engravings entirely suited to the subject matter.

Looking for the perfect gift for that boating enthusiast in your life? Or that trivia buff who has everything? Well, you've found the answer in "Name that Boat!" .Or maybe you're the one who loves a challenge?"Name that Boat!" is the saltiest book ashore and will tease and please you with it's interesting, intriguing and wide-ranging questions taken from boats real and imagined. History, TV, literature, movies-you name that boat and chances are you'll find it here.Read "Name that Boat!" and amaze and surprise with your knowledge of this specialized area of trivia. After all, how many of us know the name of the boat that brought the Statue of Liberty to America?. or Lt. Pinkerton to his Madam Butterfly?. or the Maltese Falcon to San Francisco?. and thinking of Bogart.the name of the boat he and Katherine Hepburn brought to stardom on the big screen?.Yes, "Name that Boat!" is the gift that will be enjoyed and shared by everyone who loves boating or trivia. Be sure to surprise that special person with this unique gift. Perfect for those 'hard to buy for' readers and sailors.

What is math? How exactly does it work? And what do three siblings trying to share a cake have to do with it? In How to Bake Pi, math professor Eugenia Cheng provides an accessible introduction to the logic and beauty of mathematics, powered, unexpectedly, by insights from the kitchen. We learn how the bechamel in a lasagna can be a lot like the number five, and why making a good custard proves that math is easy but life is hard. At the heart of it all is Cheng's work on category theory, a cutting-edge "mathematics of mathematics," that is about figuring out how math works. Combined with her infectious enthusiasm for cooking and true zest for life, Cheng's perspective on math is a funny journey through a vast territory no popular book on math has explored before. So, what is math? Let's look for the answer in the kitchen.

Part of an exciting series of sturdy, square-box 1000-piece jigsaw puzzles from Flame Tree, featuring powerful and popular works of art. This new jigsaw will satisfy your need for a challenge, featuring artist Nel Whatmore's "A Million Shades". This 1000 piece jigsaw is intended for adults and children over 13 years. Not suitable for children under 3 years due to small parts. Now includes an A4 poster for reference. Nel Whatmore is a fine artist, well known for her floral paintings and abstracts. As with many of her paintings, A Million Shades was built up over several months, until Nel was happy with the final piece. A contemporary colourist, her paintings are both expressionist and evocative. She seeks t o constantly explore mediums and their ability to convey emotion. Her work i s varied, with landscapes and skyscapes featuring alongside still life and floral works, which encapsulate her interest in expressionist painting. She expresses her love of flowers not only through her fine art, but also her textile designs, and regularly exhibits her work at the Chelsea Flower Show.

Everyone's favorite puzzles-now in large print! The Everything Large Print Word Search Book is the perfect addition for puzzlers weary of small type and tight spacing in regular word search puzzles. This all-new volume of oversized puzzles is perfect for someone who prefers large type, while also helping to boost vocabulary, memory, and problem-solving skills. There's a puzzle in here for everyone, with themes ranging from classic television shows and bestselling books to favorite foods and the latest music.

A NEW day-of-the-week series with 100 puzzles in a convenient portable paperback package Nobody loves Monday best...unless you're a New York Times crossword puzzle solver! This collection of 100 easy crosswords will give you a case of the Mondays in the best possible way. Features: -100 easy Monday puzzles -Bold, fun series cover design -Edited by crossword legend Will Shortz

THE TANGRAM is one of the oldest types of dissection puzzles in the world that originated from China. It traditionally requires the participant to arrange seven pieces (or 'tans') into a shape just by looking at the given silhouette.LEARN WHILE PLAYING The puzzles in this unique book are fresh, innovative and compelling. The puzzle pieces are building units for puzzles that boost mental dexterity with a variety of challenges from various fields of recreational mathematics. Come on and play with symmetry puzzles, cover-up puzzles and self-similarity puzzles to increase your skill and mental acuity!NEW PUZZLE DESIGNS To add variety and challenge, some of the puzzles may not use all seven pieces of the Tangram set, while others may use pieces from two or more sets.The authors utilize a creative twist in this collection that is different from classic Tangram puzzles: Most of the puzzles do not allow connections between the pieces unless they share a common edge. With this slight change to the rules, an entirely new universe of Tangram puzzles and challenges is unleashed to delight the puzzle solver!PROVIDES HOURS OF FUN The majority of the puzzles in this book are new and original. They range in difficulty to suit various levels of puzzle enthusiasts. Some selections are based upon famous classic puzzles while others are modified to stimulate and captivate the puzzlist as they have done for more than a thousand years!

The fun-filled quiz book that kids and the whole family will enjoy Have fun with family and friends with this book of brain-teasing riddles that will have everyone scratching their heads! I'm the world's fastest land animal. I can't climb trees. What am I? My eyes are bright, my chest is red, you might see me perched on your garden shed! What am I? My fur is black and white. I spray my enemies with a very smelly liquid. What am I? Packed with rhyming riddles, laugh out loud jokes, tricky teasers and tons of colourful photos they are sure to keep animal fans of all ages entertained!

Put your brain to the test with this selection of 200 puzzles designed to challenge, stimulate and entertain! With puzzles for all abilities, from novice to seasoned puzzler, there is something here for every crossword fan. Whether killing time at home or facing the daily commute, these brainteasers will provide hours of fun.

Get your mind in gear with Daily Mail Quick Crosswords Volume 1! This brand new collection of demanding puzzles from the Daily Mail puzzle pages contains over 200 grids in a variety of difficulties. Whether on-the-go, or having a spare moment at home, these fun brainteasers are guaranteed to put minds of all ages and abilities through their paces!

Challenge yourself with number puzzles Previously unpublished quality Su Doku grids from The Times, which help develop your skills to take on Extreme Su Doku. The 200 puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best solving techniques to get to the end of this testing challenge. The puzzles in the collection are of the highest quality and are perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles. Guaranteed to provide hours of mind-stretching entertainment.