Sudoku and number puzzles Books

Book SynopsisQuiz your family at home with crosswords, puzzles and games.For anyone who loves the challenge of Su Doku but manages to solve them within minutes, you can now enjoy the extended mental workout and ultimate endurance test of a five grid interlinked system.This is Su Doku multiplied: every column, row and 3x3 box must contain the digits 1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usual 9x9 length but the interlocking boxes give you more clues and more complexity.With another 100 new Samurai puzzles to vex you for hours, lose yourself in the four levels of this book:10 Easy40 Mild40 Difficult10 Super difficultEven the speediest of Su Doku solvers will be agonising over these ultra-complex, extended brain-teasers.These are the most difficult Su Doku puzzles in The Times range.

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Book SynopsisFor anyone who loves the challenge of Su Doku but manages to solve them within minutes, you can now enjoy the extended mental workout and ultimate endurance test of a five grid interlinked system.This is Su Doku multiplied: every column, row and 3x3 box must contain the digits 1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usual 9x9 length but the interlocking boxes give you more clues and more complexity.With another 100 new Samurai puzzles to vex you for hours, lose yourself in the four levels of this book:10 Easy40 Mild40 Difficult10 Super difficultEven the speediest of Su Doku solvers will be agonising over these ultra-complex, extended brainteasers.These are the most difficult Su Doku puzzles in The Times range.

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Book SynopsisChallenge yourself at home with word and number puzzlesFor those who like to live dangerously and push beyond their mental comfort zone, steel yourself for the second book in The Times'' toughest Killer series yet.Prepare for the extreme mental challenge of 100 Deadly-level Killer puzzles, including, exclusive to The Times, 20 Extra Deadly, to really test your limits: this is the only series in which you''ll find such a torturous collection.The Times Ultimate Killer Su Doku 2 is not for the fainthearted. The puzzles use the same 9x9 grid as Su Doku, and have an added mathematical challenge. The aim is not only to complete every row, column and cube so that it contains the digits 1-9, it is also necessary to ensure that the outlined cubes add up to the same number as well.If the first Ultimate Killer Su Doku didn''t scare you off see how you fare after tackling this one

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Book Synopsis300 hand-picked puzzles from the world''s Su Doku Master.Su Doku took the world by storm when Wayne Gould published his first series of puzzles in The Times. Marking 20 years and more since this publishing phenomenon Wayne has hand-selected 300 of his original puzzles for this special collection.The ideal gift for every fan of Su Doku.During a visit to Japan, Wayne was in a bookstore where, not knowing how to read or speak Japanese, he was drawn to the puzzle which he first thought was a crossword. He was intrigued and later on he decided to take it with him to the United States and Britain. After his initial retirement, in efforts to pass time and sharpen his computer skills, Gould developed a computer program that generates Su Doku puzzles.The rest is history, Su Doku became a massive hit worldwide and continues to challenge minds to this day with The Times at the forefront of Su Doku publishing in print and online.Enjoy this selection of Wayne''s original puzzles.Easy, Mild, Difficult and Fiendish puzzles included.

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Book SynopsisChallenge yourself at home with number puzzlesFor anyone who loves the challenge of Su Doku but manages to solve them within minutes, you can now enjoy the extended mental workout and ultimate endurance test of a five grid interlinked system.This is Su Doku multiplied: every column, row and 3x3 box must contain the digits 1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usual 9x9 length but the interlocking boxes give you more clues and more complexity.With another 100 new Samurai puzzles to vex you for hours, lose yourself in the four levels of this book:10 Easy40 Mild40 Difficult10 Super difficultEven the speediest of Su Doku solvers will be agonising over these ultra-complex, extended brainteasers.These are the most difficult Su Doku puzzles in The Times range.

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Book SynopsisChallenge yourself at home with word and number puzzlesThese are previously unpublished quality Su Doku grids from the puzzle providers to The Times, and help to develop you 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.

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Book SynopsisChallenge yourself with number puzzlesPreviously 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.

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Book SynopsisContains 300 puzzles.

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Book SynopsisWinner, Euler Book Prize, awarded by the Mathematical Association of America. With over 200 full color photographs, this non-traditional, tactile introduction to non-Euclidean geometries also covers early development of geometry and connections between geometry, art, nature, and sciences. For the crafter or would-be crafter, there are detailed instructions for how to crochet various geometric models and how to use them in explorations. New to the 2nd Edition; Daina Taimina discusses her own adventures with the hyperbolic planes as well as the experiences of some of her readers. Includes recent applications of hyperbolic geometry such as medicine, architecture, fashion & quantum computing.Trade Review"This beautifully and profusely illustrated second edition of "Crocheting Adventures with Hyperbolic Planes" is a unique and extraordinary instructional manual and guide that is unreservedly recommended for personal, professional, community, and academic library"—James A. Cox, Editor-in-Chief, Midwest Book Review"This book shows just how fun deep mathematics can be and reveals the importance of thinking of mathematics with your hands, eyes and body — not just the brain. More importantly, it shows how good mathematics needs input from all sorts of people and cultures, in particular here the geometry essential to fibre arts."—Professor Edmund Harris, University of Arkansas, co-author of Patterns/Visions of the Universe with Alex Bellos"This is a lovely introduction to hyperbolic geometry and how to represent it in a tactile, playful way. The book takes you through a wonderful history of both the maths and the art, exploring how we have perceived the world around us over the centuries and how this applies today. You get to explore the concepts with your own hands and really see how it all works. As both a mathematician and a crocheter I’m itching to make my own hyperbolic planes and use them in all sorts of places!"—Samantha Durbin, The Royal Institution of Great BritainThis is the second edition of the book Crocheting Adventures with Hyperbolic Planes, which won the 2012 Euler Book Prize[. . . . ]This book presents an amazing hybrid approach to two seemingly different audiences: mathematicians and fiber artists.For the mathematician, the book presents a tactile approach to the very theoretical concepts in hyperbolic geometry, providing clear directions on how to construct objects in hyperbolic geometry. This book is a great introduction to hyperbolic geometry for anyone wanting to know about the subject and would be a great asset to any undergraduate math student studying non-Euclidean geometries.For the fiber artist interested in crochet, the book does a great job of explaining very advanced mathematics in an inviting and understanding way, encouraging artists to pursue more mathematics to incorporate into their creative works. It also provides insight into the creative process of developing mathematics, showing that mathematicians and artists both use very creative processes.This book is extremely well-written and organized. [. . . .] The book also weaves together the history and development of non-Euclidean geometries and their connections to many different areas such as art, biology and nature, physics, computer science, music, chemistry, and architecture. Each chapter has a clear purpose, and the imagery really complements the writing. At the end of the book, there is a section on how to make models. For the artist interested in crochet, the directions are a little bit more mathematical, but they are presented clearly. It will definitely be quite different than any pattern you have read before! For the mathematician who would like to have some tactile hyperbolic models, there are directions for making models out of paper as well. This book is more than just a great introduction to hyperbolic geometry, it is a great book to showcase the work of mathematicians and the process of discovering mathematics. As mathematicians, we often only present our finished and most-polished versions of our work, and we don’t let many people see the process by which this polished mathematics was developed.This book gives the reader insight into that process and illuminates the creativity involved in the development of mathematics.—Rachelle Bouchat, MAA Reviews October 2019Praise for previous edition"2012 Euler Book Prize Winner ...elegant, novel approach... that is perfectly capable of standing on its mathematical feet as a clear, rigorous, and beautifully illustrated introduction to hyperbolic geometry. It is truly a book where art, craft, science, and mathematics come together in perfect harmony."—MAA, December 2011"This book is richly illustrated with photographs and colored illustrations and it has been produced on high-quality paper. It would be a useful addition to the library of a school or university."—Gazette-Australia, May 2011"Daina's crochet models break through the austere, formal stereotype of mathematics and present a path to a whole-brain understanding of a beautiful cluster of simple and significant ideas. The book helps to change the way of thinking about mathematics - an art of human understanding!"—Corina Mohorianu, Zentralblatt MATH, September 2009"The models illustrated in this book are prime examples of art influencing mathematics. Daina provides the necessary instructions for even novices to crochet and create hyperbolic models of their own."—Swami Swaminathan, Canadian Mathematical Society Notes, October 2009"It lays out the fundamental knowledge for appreciation of tactile hyperbolic manifolds cautiously and accessibly. ... an enjoyable read for a general audience."—David Jacob Wildstrom, Mathematical Reviews, December 2009Table of ContentsForeword by William Thurston. Introduction. What Is the Hyperbolic Plane? Can We Crochet It?. What Can You Learn from Your Model?. Four Strands in the History of Geometry. Tidbits from the History of Crochet. What is Non-Euclidean Geometry?. Pseudosphere. Metamorphoses of the Hyperbolic Plane. Other Surfaces with Negative Curvature. Looking for Applications of Hyperbolic Geometry. Hyperbolic Crochet goes Viral. Appendix: How to Make Models.

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Book SynopsisChallenging brainteasers to test your puzzle-solving skillsIf you relish a challenging mental workout, these brain teasers will demand your very best solving skills. The structure of each Mindset is the same: 3 questions, first a word puzzle, then a numerical puzzle, and a third which is shorter and easier than the first two.Written by Chris Pringle, Colin Whorlow and Daniel Shiu.But do not worry, solutions are found at the back of the book so you can get into the head of these fiendish setters and work out their devilish methods!We have included a useful Appendix at the end to help as an aide-mémoire for some recurring themes.These tricky teasers require serious application, imagination and skill to solve. Some demand a logical approach, others a methodical, mathematical mind, or a leap of the imagination!Do you have the right Mindset to take on the challenge of solving these rigorous but entertaining word, logic and number puzzles?

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Book SynopsisDo you love sudoku? Do you want to test your skills with a unique maths and logic game? If you do, then you will love this collection of over 200 puzzles ideal for you to do anytime, anywhere. In Sudoku Challenge, you fill in the puzzles with the usual rules, but when the grid is complete, you then use the clue numbers to work out how to calculate the challenge number.  Unique, fun, and interactive this collection of brain-teasing puzzles, can be played offline and will keep you entertained for hours and hours. Whether you are looking for puzzle practiceto train your brain, or seeking a screen-free offline alternative to online puzzles, or a sudoku challenge like no other this collection will have you enthralled.  

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Book SynopsisSudokus are the ever-popular number placement puzzles that give your brain an excellent mental workout. Spanning four increasingly difficult levels to challenge all abilities of solver, and presented in an easy-to-read large-print type, this collection is sure to keep you entertained for hours.• LARGE PRINT: Put your reading glasses away! This large-print book allows you to puzzle away without straining your eyes. • EXERCISE YOUR BRAIN: Give your mind a great workout as you pit your wits against these number-placement teasers. • REDUCE STRESS: Feel your stress melt away as you focus on these satisfying puzzles.

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Book SynopsisContinuing the popular Overworked & Underpuzzled series, Serene Sudoku contains almost 200 of the ever-popular Sudoku puzzles to help focus your frazzled mind. There are nearly 200 puzzles, all of which are perfect for anyone who needs something to focus on during a brief break in their busy day. With multiple levels of difficulty provided, this is the perfect puzzle book for anyone who works too hard and loves the serene logic of a Sudoku. Table of ContentsNearly 200 Sudoku puzzles and solutions.

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Book SynopsisImprove your powers of memory and recall and unlock your full potential with this brand-new title in Mensa's brain-training series.This full-colour book guides you through eight chapters, each focussed on your memory, how it works, and how you can both maintain and improve it.From tricks of visualisation and linking to mnemonics and mind palaces, as you progress your memorization skills will improve in both the short and long-term. The book will take you through the science behind memory, give instruction on how to improve yourself, and provide you with a series of puzzles and exercises to get you started on your memory-improving journey!Table of ContentsIntroduction • Meet your memory • Types of memory • How to remember • Memory techniques • More techniques • Day-to-day memory • Memory palaces • Challenge yourself • Solutions.

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Book SynopsisTaking a page from karate - another Japanese art - each title in the series is graded by colour: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers.

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Book SynopsisEnables anyone with basic math and science skills to estimate virtually anything - quickly - using plausible assumptions and elementary arithmetic. This book presents an array of estimation problems that range from devilishly simple to quite sophisticated and from real-world concerns to silly ones.Trade Review"Dr. Adam and his colleague Lawrence Weinstein, a professor of physics, offer a wide and often amusing assortment of Fermi flexes in a book that just caught my eye, Guesstimation: Solving the World's Problems on the Back of a Cocktail Napkin."--Natalie Angier, New York Times "An important skill of great use ... is the ability to derive an approximate result from insufficient data. Guesstimation is a collection of [problems] gathered from everyday life and various fields. Working out questions ... is both entertaining and enlightening. It may also help foster your career ... because making correct guesses quickly establishes your reputation as an expert."--Stephan Mertens, Science "This book is a stimulating collection that will help the reader to reach informed judgments and will be a useful source of inspiration for mathematics and physics teachers: my only concern is that if my students have read it before they arrive at university, I may have to find a new approach to my first day's teaching."--Tony Mann, Times Higher Education "While few can hope to emulate the brilliance of a Nobel Prize winner like [Enrico] Fermi, coming up with pretty good guesstimates is a skill that can be taught. And that's the aim of Guesstimation. After a quick tutorial, the authors get down to business with a host of wide-ranging worked examples, from estimating the numbers of piano tuners in Los Angeles to figuring out the impact of deforestation on greenhouse gas levels. The results are sometimes surprising."--Robert Matthews, BBC Focus Magazine "[Guesstimation is] a left-brain book that helps you approximate answers to the types of questions actually asked in some job interviews today."--Peter Coy, BusinessWeek "[A] delightful account of mathematical approximation, which instills the beauty and power of the back-of-the-envelope calculation. The puzzles make addictive confidence builders by breaking down tricky questions into manageable parts. Never again will you take a newspaper figure at face value without feeling the need, and confidence, to guesstimate your own figure."--Matthew Killeya, New Scientist "Guesstimation is both enlightening and entertaining. I recommend it to my fellow journalists both as a tool of our trade and as a mind stretcher."--Rony V. Diaz, Manila Times "Any idea what fraction of land in the US is covered by either a roof or pavement? Known as a Fermi problem, this type of question requires the use of reasonable estimation, which is the focus of the book at hand. In the initial chapters, Weinstein and Adam briefly review good 'guesstimation' techniques involving numbers and explain why the use of the geometric mean is preferred over the arithmetic mean."--J. Johnson, Choice "How many people in the world are picking their nose right now? Weinstein and Adam 'guesstimate' the answer to this problem and 79 others, covering chemistry, physics, biology and history. The book is a step-by-step guide to problem-solving using rough-and-ready maths, the kind done on the back of a cocktail napkin. And the authors have kindly left additional questions at the end to get readers started on their own problem-solving expedition."--Cosmos "Physics educators can use this book as a guide to including the important skill of estimation in their courses. Students may find the power of estimation to be a valuable skill and will want to work their way through this book."--Arthur Eisenkrafr, American Journal of Physics "A source of imaginative problems, this book would make a nice addition to a mathematics department library."--Diane Resek, Mathematics Teacher "[I]t's quite obvious that the authors intend their book to be fun, nonthreatening, and user-friendly. There's very little not to like... [T]he book can be for everybody, 'higher-up professionals' who might know math but not physics, as well as students wrestling with 'word problems.' Teachers could very well recommend it to math majors and nonmajors alike, or even use it in the classroom, in some cases as supplementary reading for the course."--Marion Deutsche Cohen, Mathematical Intelligencer "The cumulative effect of fairly simple paths to estimating solutions to a dizzying array of difficult problems is fascinating."--Ray Bert, Civil Engineering "This book will be enjoyed by anyone with an interest in estimation, but is also targeted at those applying for jobs at companies like Google, where the kind of questions considered in the book are often used in the interview process."--Paul Taylor, Mathematics TodayTable of ContentsAcknowledgments xi Preface xiii Chapter 1: How to Solve Problems 1 Chapter 2: Dealing with Large Numbers 11 2.1 Scientific Notation 11 2.2 Accuracy 14 2.3 A Note on Units 16 2.4 Unit Conversion 17 Chapter 3: General Questions 19 3.1 One big family 21 3.2 Fore! 25 3.3 This is a fine pickle you've got us into, Patty 29 3.4 Throwing in the towel 31 3.5 Hey buddy, can you fill a dome? 35 3.6 A mole of cats 39 3.7 Massive MongaMillions 41 3.8 Tons of trash 43 3.9 Mt. Trashmore 47 3.10 Juggling people 51 3.11 Shelving the problem 53 Chapter 4: Animals and People 55 4.1 More numerous than the stars in the sky 57 4.2 Laboring in vein 61 4.3 Unzipping your skin 65 4.4 Hair today, gone tomorrow 69 4.5 Hot dawg! 73 4.6 Playing the field 75 4.7 Ewww... gross! 77 4.8 Going potty 79 4.9 Let's get one thing straight! 83 Chapter 5: Transportation 87 5.1 Driving past Saturn 89 5.2 Drowning in gasoline 91 5.3 Slowly on the highway 95 5.4 Rickshaws and automobiles 99 5.5 Horse exhaust 103 5.6 Tire tracks 107 5.7 Working for the car 109 Chapter 6: Energy and Work 113 6.1 Energy of height 114 6.1.1 Mountain climbing 115 6.1.2 Flattening the Alps 119 6.1.3 Raising a building 123 6.2 Energy of motion 126 6.2.1 At your service 127 6.2.2 Kinetic trucking 129 6.2.3 Racing continents 131 6.2.4 "To boldly go... " 135 6.3 Work 138 6.3.1 Crash! 139 6.3.2 Spider-Man and the subway car 143 Chapter 7: Hydrocarbons and Carbohydrates 145 7.1 Chemical energy 145 7.1.1 Energy in gasoline 147 7.1.2 Battery energy 151 7.1.3 Battery energy density 155 7.1.4 Batteries vs. gas tanks 159 7.2 Food is energy 162 7.2.1 Eat here, get gas 163 7.2.2 Farmland for ethanol 167 7.3 Power! 170 7.3.1 Hot humans 171 7.3.2 Fill 'er up with gasoline 173 7.3.3 Fill 'er up with electricity 175 Chapter 8: The Earth, the Moon, and Lots of Gerbils 179 8.1 "And yet it moves" (e pur si muove) 181 8.2 Duck! 185 8.3 Super-sized Sun 189 8.4 Sun power 193 8.5 Gerbils 1, Sun 0 197 8.6 Chemical Sun 201 8.7 Nearby supernova 205 8.8 Melting ice caps 209 Chapter 9: Energy and the Environment 213 9.1 Power to the people 215 9.2 Continental power 219 9.3 Solar energy 223 9.4 Land for solar energy 225 9.5 Tilting at windmills 229 9.6 The power of coal 233 9.7 The power of nuclei 237 9.8 Hard surfaces 239 Chapter 10: The Atmosphere 243 10.1 Into thin air 245 10.2 Ancient air 247 10.3 Suck it up 251 10.4 CO2 from coal 255 10.5 A healthy glow 259 10.6 CO2 from cars 261 10.7 Turning gas into trees 265 10.8 Turning trees into gas 269 Chapter 11: Risk 273 11.1 Gambling on the road 275 11.2 The plane truth 277 11.3 Life's a beach 279 11.4 Up in smoke 281 Chapter 12: Unanswered Questions 285 Appendix: Needed Numbers and Formulas 289 A.1 Useful Numbers 289 A.2 Handy Formulas 289 A.3 Metric Prefixes 290 B Pegs to Hang Things On 291 Bibliography 295 Index 299

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Book SynopsisTest your powers of logic with these challenging Su Doku puzzles.The latest volume in the hugely popular Killer Su Doku series from The Times, featuring the highest-quality puzzles with an extra element of arithmetic.These puzzles will test your skills to the limit, adding the challenge of arithmetic and taking Su Doku to a new and even deadlier level of difficulty.The puzzles use the same 9x9 grid as Su Doku but with an added mathematical challenge. The aim is not only to complete every row, column and cube so that it contains the numbers 1-9, it is also necessary to ensure that the outlined cubes add up to the same number as well.With 200 new Moderate, Tricky, Tough and Deadly Killer Su Doku puzzles, there is no chance to ease yourself in with simple puzzles. For those who like to live dangerously and pushbeyond their mental comfort zone, steel yourself for The Times'' next, terribly tough instalment.

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Book SynopsisChallenge yourself at home with word and number puzzlesA new title in the Fiendish Su Doku series, concentrating entirely on the more difficult Super Fiendish puzzles. These are previously unpublished quality Su Doku grids from the puzzle providers to The Times, and help to develop you 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.

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Book SynopsisKakuro is a puzzle type in which sums are given and solvers must deduce the numbers in the individual boxes. This title is suitable for solvers who have dared to come this far, congratulations.

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Book SynopsisChallenge yourself at home with word and number puzzlesThe fourth instalment of the successful Times Killer Su Doku series. Adding the challenge of arithmetic and taking Su Doku to a new deadly level of difficulty.The puzzles use the same 9x9 grid as normal Su Doku but with an added mathmatical challenge. The aim is not only to complete every row, column and cube so that it contains the digits 1-9, it is also necessary to ensure that the outlined cubes add up to the same number.With 150 new Killer Su Doku puzzles, you can ease yourself in with the Moderate before taking the plunge and tackling the real killers:20 Moderate50 Tricky50 Tough30 DeadlyFor those who like to live dangerously and push beyond their mental comfort zone, steel yourself for The Times' toughest collection yet.

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Book SynopsisThis book is brimming with memory, word and number workouts - challenge yourself to some fun with over 100 brain games that will test your skills - and build on them.

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Book SynopsisSixy Sudoku puzzles bring a whole new dimension of logic, making a 6 x 6 possibly even more fun than a 9 x 9 Sudoku! There is no plain hard work, just a lot of logic and insight.Peter Ritmeester, founder and owner of PZZL.com, is the inventor of Hyper Sudoku where four gray regions also contain 1-9. By applying this idea to 6 x 6 Sudoku, an additional level of logic is created. Pocket Posh Sixy Sudoku Easy to Medium Puzzles features a foreword, an extensive how-to-play section, 200 easy to medium puzzles, and complete solutions at the back. The rules: insert the digits 1-6 just once in each a) row, b) column, c) bold outlined area AND d) in each white and gray rectangle.

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Book SynopsisTakes a page from karate - another Japanese art - each title is graded by colour: White for easy, Green for medium, Brown for hard &, Black Belt, for the super-tough. This title features a handy-sized format.

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Book SynopsisTest your powers of logic with these challenging Su Doku puzzles.For anyone who loves the challenge of Su Doku but manages to solve them within minutes, you can now enjoy the extended mental workout and ultimate endurance test of a five grid interlinked system.This is Su Doku multiplied: every column, row and 3x3 box must contain the digits 1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usual 9x9 length but the interlocking boxes give you more clues and more complexity.With another 100 new Samurai puzzles to vex you for hours, lose yourself in the four levels of this book:10 Easy40 Mild40 Difficult10 Super difficultEven the speediest of Su Doku solvers will be agonising over these ultra-complex, extended brainteasers.These are the most difficult Su Doku puzzles in The Times range.

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Book SynopsisKenKen is the brilliant successor to Su Doku that’s taken Japan by storm. In collaboration with The Times, Collins - the no 1 puzzle publisher - are proud to publish it in the UK. KenKen is a brain-training puzzle based on logic and simple arithmetic. Perfect for all ages and highly addictive, KenKen puzzles challenge and entertain in an entirely new way. The puzzle was invented by a charismatic Japanese maths teacher, Tetsuya Miyamoto in 2004. The name comes from ‘Ken’ which is the Japanese word for clever and KenKen translates as‘square wisdom’. It’s based on simple arithmetic and each puzzle involves some or all of the following skills: addition, subtraction, multiplication and division. As with Su Doku there are clearly defined levels for each type of puzzle from beginner and intermediate to advanced and the puzzles can be on any size grid, from 3 x 3 up to 9 x 9. The puzzles improve numeracy, logical thinking,

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Book SynopsisKakuro is fun - but if the puzzles aren't just right, newcomers can feel frustrated. This title eases novices into solving kakuro puzzles, helping them improve and preparing them for the next level of difficulty.

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Book SynopsisChallenge yourself at home with word and number puzzlesA new collection of previously unpublished Fiendish Su Doku puzzles with the added bonus of 30 Super Fiendish puzzles. Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles. Guaranteed to provide hours of absorbing, brain-stretching entertainment.The puzzles in this collection are of the highest quality supplied by Sudoku Syndication, the Sudoku suppliers to The Times newspaper.Since the first Su Doku puzzle appeared in The Times in November 2004, they have become a phenomenon, with over 5 million copies of The Times Su Doku books sold worldwide. You don''t need to be a mathematical genius to solve these puzzles; it is simply a question of logic. Each puzzle has a unique solution and there''s no guesswork required.The Times Su Doku remains the original, the best and the market leader.

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Book SynopsisChallenge yourself at home with word and number puzzlesThis is the seventh title in the Fiendish series the latest volume of quality previously unpublished puzzles from the puzzle providers to the Times.You don't need to be a mathematical genius to solve the puzzles in this collection of Fiendishly difficult puzzles, it is simply a question of logic.Since the first Su Doku puzzle appeared in The Times in November 2004 they have become a phenomenon, with over 5 million copies of the Times Su Doku series sold worldwide.The puzzles in the collection are of the highest quality from the puzzle suppliers to The Times. Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles, and guaranteed to provide hours of mind-stretching entertainment.

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Book SynopsisMagical Mathematics reveals the secrets of fun-to-perform card tricks--and the profound mathematical ideas behind them--that will astound even the most accomplished magician. Persi Diaconis and Ron Graham provide easy, step-by-step instructions for each trick, explaining how to set up the effect and offering tips on what to say and do while performTrade ReviewWinner of the 2013 Euler Book Prize, Mathematical Association of America Honorable Mention for the 2012 Award for Best Professional/Scholarly Book in Popular Science & Popular Mathematics, Association of American Publishers "[F]ascinating... Magical Mathematics [is] a dazzling tour of math-based magic tricks... Lovers of recreational mathematics, and especially fans of the late Martin Gardner, who contributed the foreword, will find many pleasures in Magical Mathematics. And while exposing magic secrets in a book intended for the general public may raise hackles among some old-guard magicians, exploring the math behind these tricks will, in truth, only deepen the mystery. For, as the authors remind us, sometimes the methods are as magical as the tricks themselves."--Alex Stone, Wall Street Journal "The Riemann hypothesis, the Mandelbrot set, Fermat's last theorem--these mathematical notions and others underlie all manner of magic tricks. Mathematicians Persi Diaconis--also a card magician--and Ron Graham--also a juggler--unveil the connections between magic and math in this well-illustrated volume."--Scientific American "Writing for the public, the two authors share their passions, teaching sophisticated mathematical concepts along with interesting card tricks, which rely upon those principles for their workings."--GENII: The Conjurors' Magazine "[I]t is simply a beautiful book. The design, layout, typography, even the paper is beautiful... [T]his is one of the most fun, engaging new popular mathematics books I've seen in a long time."--The Math Less Traveled Blog "The authors are master storytellers... [T]he authors offer advice and recommendations for further pursuits in mathematics, magic and juggling."--Cut-the-Knot blog "Well known and highly respected in the mathematical community, Diaconis and Graham have produced a work that completely lives up to expectations. It contains descriptions of magic tricks as viewed by an audience, the mathematics that make them possible, and clear explanations to help you--with a little practice--amaze your friends."--Library Journal "Magical Mathematics gives readers a peek behind the velvet curtain that hides the magician's secrets... The book covers some nifty card tricks, juggling, codes and a slew of mind-bending puzzles. The book doesn't just tell you how to fool and impress your friends with parlour tricks, it explains why these tricks work, so that you can go on to devise your own--in fact, the authors challenge you to do just that. The writing is lively and the tricks are well set-up, providing newbie magicians with both points of view: what the audience sees and what the magician knows."--Montreal Gazette "Magical Mathematics is an absolutely remarkable book. I don't say this lightly. Publishers send me plenty of books to review. Some I like more than others. Magical Mathematics is a fantastic book for someone who wants to explore the non-trivial math behind some impressive magic tricks. While I enjoy purely recreational math puzzles that have no practical application I also love it when I discover challenges that are interesting and relevant. Magical Mathematics is chock full of fun (and deep) challenges that students (and adults) can sink their teeth into."--Wild About Math blog "Over 12 chapters, the reader is taken on a unique and wonderful tour that fuses magical tricks with underlying mathematical explanations and personal stories, written by world-renowned experts in both fields. With its friendly, disarming style, the book is pitched perfectly at a level that will surprise both the hardened mathematical researcher and the interested general reader, without putting either of them off... [T]his book is a must-buy."--C.J. Howls, Times Higher Education Supplement "The first chapter of this book begins by teaching a simple four-card trick and ends by presenting--complete with step-by-step color illustrations--a more complicated card trick that will truly amaze any audience. Both tricks are based on mathematical principles, and the book goes on to explain these and many other principles that can be the basis for a variety of clever magic tricks."--Games magazine "Learn the secrets behind card tricks, including step-by-step instructions for performing them, along with the mathematical ideas the tricks illustrate."--Science News "As magic books go, Magical Mathematics is erudite, thought provoking, inspiring... It is the product of multiple decades of work and research, and for a small subset of magic enthusiasts it could rank as the best book they buy this decade."--James Alan, Magicol "There is so much to digest in this book that it is impossible to describe even a fraction of it in just a few paragraphs. Let it suffice to say that if you are at all interested in card magic principles, how they work, why they work, and the history behind them, to ignore this book would be a serious mistake."--Peter Duffie, Magic magazine "From arcane theories to practical tips for working magicians, the authors go behind the curtain and reveal how the pros do it."--San Jose Mercury News "The connection between magic and mathematics has a long and intriguing history, and throughout their book Diaconis and Graham present detailed and fascinating insight into that history... Overall, the book is a wonderful introduction to this esoteric area, but has more than enough depth to entertain and enlighten the knowledgeable. Perhaps most important of all, it shows how deconstructing illusion can provide fascinating insight in the nature of reality."--Richard Wiseman, Nature Physics "Magical Mathematics strikes a nice balance between descriptions of performable magic tricks and the mathematics that makes them work. Unlike some 'mathemagic' books, in this work, Diaconis and Graham describe magic tricks that are actually used by professionals... [T]he writing is engaging, and learning the tricks that are presented is well worth the effort... This volume should find a place in any mathematics or magic library collection."--Choice "While turning the last pages, the reader is bound to feel touched and charged up and would definitely be moving in an altered direction, for this is a book that will not just leave an impression, but will also suggest which path to take next."--Shubashree Desikan, Current Science "Reading Magical Mathematics ... had ... [a] powerful effect on me. I was transported to a strange and shadowy world of card tricks and magic that, at the same time, was miraculously a land of mathematics, a land with substance... Barely ten pages into the book I am completely hooked."--John J Watkins, Mathematical Reviews "The authors have produced an invaluable contribution to the fascinating relationship between magic and mathematics... The authors exhibit a lifelong passion, enthusiasm and deep knowledge for magic and mathematics and this is an ideal combination for producing a great read... I highly recommend it to anybody interested in the mathematics behind some impressive magic."--Fiacre O. Cairbre, Irish Mathematical Society Bulletin "Mathematical Magic is a truly magical book, containing ample amounts of mathematics and magic that will amaze and amuse. Diaconis and Graham are both first-rate mathematicians and performers and offer insights and ideas that could not have been expressed by anyone else. This book is destined to be a classic on the subject."--Arthur Benjamin, SIAM "This is a splendid book with lots of wonderful insights... Give this book a try; you certainly will not be disappointed."--Phil Dyke, Leonardo Reviews "While there are other books out there detailing the relationship between mathematics and magic, this book is perhaps the best written of them all, as it will appeal to magicians, math buffs and general readers alike."--R. S. Beer, MagicBookReviews.comTable of ContentsForeword ix Preface xi Chapter 1: Mathematics in the Air 1 Royal Hummer 8 Back to Magic 15 Chapter 2: In Cycles 17 The Magic of de Bruijn Sequences 18 Going Further 25 Chapter 3: Is This Stuff Actually Good For Anything? 30 Robotic Vision 30 Making Codes 34 To the Core of Our Being 38 This de Bruijn Stuff Is Cool but Can It Get You a Job? 42 Chapter 4: Universal Cycles 47 Order Matters 47 A Mind-reading Effect 52 Universal Cycles Again 55 Chapter 5: From the Gilbreath Principle to the Mandelbrot Set 61 The Gilbreath Principle 61 The Mandelbrot Set 72 Chapter 6: Neat Shuffles 84 A Mind-reading Computer 85 A Look Inside Perfect Shuffles 92 A Look Inside Monge and Milk Shuffles 96 A Look Inside Down-and-Under Shuffles 98 All the Shuffles Are Related 99 Chapter 7: The Oldest Mathematical Entertainment? 103 The Miracle Divination 105 How Many Magic Tricks Are There? 114 Chapter 8: Magic in the Book of Changes 119 Introduction to the Book of Changes 121 Using the I Ching for Divination 122 Probability and the Book of Changes 125 Some Magic (Tricks) 127 Probability and the I Ching 136 Chapter 9: What Goes Up Must Come Down 137 Writing It Down 138 Getting Started in Juggling 145 10 Stars of Mathematical Magic (and some of the best tricks in the book) 153 Alex Elmsley 156 Bob Neale 160 Henry Christ 173 Stewart James 181 Charles Thornton Jordan 189 Bob Hummer 201 Martin Gardner 211 Chapter 11: Going further 220 Chapter 12: on secrets 225 Notes 231 Index 239

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Book SynopsisChannel your inner M.C. Escher with these brain teaser puzzles!

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Book SynopsisKeep your brain busy at home with everyday puzzles.A bumper collection of easy, medium and difficult Su Doku puzzles to test your mental dexterity, powers of logic and deduction. You will find 100 easy, 100 medium and 100 hard puzzles in this collection so you can gauge your progression through the difficulty levels.You will find the solutions at the back of the book.Keep your mind sharp and test your powers of deductive reasoning. Ideal for whiling away the time while travelling, on holiday or relaxing at home.

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Book SynopsisIf you relish a serious mental workout, this collection of 100 brain teasers will demand your very best lateral thinking skills and mathematical rigour to solve. These puzzles will amuse and perplex in equal measure.But do not worry, full, detailed solutions are found at the back of the book so you can get into the head of these fiendish setters!These mental puzzles require serious application, imagination and skill to solve. Some demand a logical approach, others a methodical, mathematical mind.Are you up to the challenge of solving these rigorous but entertaining mathematical puzzles?

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Book SynopsisPuzzle it out! and put your mental dexterity to the test with this wonderful collection of sudoku puzzles. The puzzles inside are set across four increasingly hard difficulty levels, so there is something for every solver from the beginner to expert. Jump in at a level that suits or work your way through and see your skills improve. Or even better, give yourself a real challenge and see not see if you can solve them all!

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Book SynopsisEric Saunders is one of the world's leading puzzle compilers. An expert crossword clue creator, IQ puzzle manipulator and innovator of many new puzzles each year, he has supplied puzzles to newspapers including The Times and is the author of many puzzle compilations for publishers around the world.

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Book SynopsisFind out your IQ, the fun way . . .-------------------------Underline the odd-man-outhouse igloo bungalow office hut-------------------------Insert the word that means the same as the two words outside the brackets.fowl (......) grumble-------------------------The intelligence quotient remains the definitive means of assessing brain capacity, and this classic book, originally published in 1962, was the first that permitted readers to determine their own I.Q. It includes an introduction by the prolific psychologist Hans Eysenck, followed by a range of easy to difficult I.Q. challenges. At the back of the book you can find the answers and your personal I.Q. rating.Good luck!

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