You don't need to be a maths expert to get hooked on sudoku, everyone's favourite number challenge. Test your logic to the limit with a brand new collection of 200 addictive grids.

In the bestselling tradition of "The Big Book of Personality Tests" and "The Big Book of Personality Tests for Women," this entertaining and enlightening collection of 100 "write-in" quizzes is designed to help women find out where they stand with current and potential loved ones and how to make those relationships better.
How well do you relate to others? Do you follow your heart? What kind of friend are you? Are you truly close to the people in your life? Women everywhere wonder about the stability of their relationships, what they can do to strengthen them-and when it is time to end them. Whether it's a question about relating to a partner, children, boss, or friends, this book will answer it!
Each quiz can be taken in just a few minutes and easily scored. Author Robin Westen, an award-winning journalist, provides expert analyses of all possible outcomes, along with tips for making positive changes in any type of relationship.

A veteran math educator reveals the hidden fascinations of geometry and why this staple of math education is important. If you remember anything about high school geometry class, it's probably doing proofs. But geometry is more than axioms, postulates, theorems, and proofs. It's the science of beautiful and extraordinary geometric relationships--most of which is lost in high school classrooms where the focus is on the rigor of logically proving those relationships. This book will awaken readers to the appeal of geometry by placing the focus squarely on geometry's visually compelling features and intrinsic elegance. Who knew that straight lines, circles, and area could be so interesting? Not to mention optical illusions. So get out the rulers, compasses, or even a software program, and discover geometry for the first time.

This calming 500-piece jigsaw puzzle from beloved artist Yao Cheng comes in a chic matching canvas pouch that's easy to store or tote on the go. Featuring ethereal watercolors that will transport you to a dreamy beachscape, this puzzle is a beautiful way to unplug and perfect grab-and-go entertainment for family getaways.

This book contains a fiendish collection of over 150 mind games to tax your powers of logic in ways you had never thought possible! All kinds of logic brainteasers are included in this Mensa-branded book that will ensure your brain cells never have a chance to rest!

Wondrous Jobs 300 Piece Family Puzzle from Mudpuppy features colorful illustrations of imaginative jobs such as a firefly electrician, seasons supervisor, pizza topping technician and many more! Mudpuppy puzzles are packaged in matte-finish sturdy boxes, perfect for gifting, reuse, and storage. * 300pc puzzle: 20 x 20", 51 x 51 cm * Box: 8 x 8 x 2", 20 x 20 x 5 cm * Ages 8-99 * Puzzle greyboard contains 90% recycled paper. Packaging contains 70% recycled paper. Printed with nontoxic inks. * All Mudpuppy products adhere to CPSIA, ASTM, and CE Safety Regulations

Introduce a music legend with this puzzle inspired by the iconic pop star. The Tuna Turner Music Cats 100 Piece Puzzle foil includes shiny embellishments on the box and puzzle and is great fun for everyone. Mudpuppy puzzles are packaged in matte-finish sturdy boxes, perfect for gifting, reuse, and storage. * 100pc puzzle: 14 x 14", 35.5 x 35.5 cm * Foil embellishments on puzzle and box * Box: 7 x 7 x 1.5", 18 x 18 x 4 cm * Ages 6-99 * Puzzle greyboard contains 90% recycled paper. Packaging contains 70% recycled paper. Printed with nontoxic inks.

This book discusses how to design "good" geometric puzzles: two-dimensional dissection puzzles, polyhedral dissections, and burrs. It outlines major categories of geometric puzzles and provides examples, sometimes going into the history and philosophy of those examples. The author presents challenges and thoughtful questions, as well as practical design and woodworking tips to encourage the reader to build his own puzzles and experiment with his own designs. Aesthetics, phychology, and mathematical considerations all factor into the definition of the quality of a puzzle.

This is the perfect book for fans of Journal 29, and those who want to re-create an exciting escape-room experience in their own home! You are Adam Parkinson, an intrepid journalist who has recently been employed by the time-travelling Wexell Corporation. Adam is invited to an unusual art gallery, filled with objects and artworks donated by a mysterious figure. It will be up to you to help Adam unravel the mysteries of the Gallery, and you will travel from Ancient Egypt to Victorian England - and beyond - to do it. And, quite possibly, to save the world! Escape from the Gallery is an immersive escape-room experience that provides a visual feast as well as a tricky puzzle adventure. Featuring artworks ranging from Ancient Egyptian hieroglyphs to Mexican masterpieces, you will need to solve visual riddles and discover the hidden secrets that lie within the artworks if you want to figure out what is going on, and why this might be the most important visit to a gallery you have ever made.

Life's odd, isn't it? People are odd, places are odd, things are odd. It's an odd old world. There's oddity in the strangest places, not least in this extreme odd-one-out challenge.

From a perfectly groomed, flowery beard and a trendy cycling cap, to a prickly cactus and a delicious flat white, discover the minute differences lurking on every page. There are odd ones out to spot, hipster accessories to match, and much more millennial fun to be had.

Cool and quirky black and white illustrations are accompanied by funny one liners and utterly useless, and odd, trivia. It's time to find the oddest of odd ones out.

What movie drastically reduced sales of merlot in the United States for a time? From the creators of the best-selling brand The Art of Mixology comes The Art of Mixology Winie Trivia, a beautifully designed trivia deck that features 100 cards of wine trivia.

Explore the chemistry of cocktails and mocktails with The Art of Mixology . Become your own bartender and create new, delicious concoctions using the best of traditional and contemporary recipes. Have fun and make yourself a drink!

100 double-sided cards with trivia questions and beautiful photographyTest your knowledge with 100 fun questions.

Housed in a sturdy, attractive box with magnetic closure and detailed artwork, this set is a stylish addition to any home bar or kitchen.Elevate your hosting game with this ultimate trivia game. Cheers!

Quiz your family at home with crosswords, puzzles and games. Su Doku is the classic number puzzle. The Times Su Doku Book 14 contains a mix of 150 mind-bending variations, ranging from mercifully Mild to the uber-challenging Super fiendish: 10 Mild puzzles 60 Difficult puzzles 50 Fiendish puzzles 30 Super fiendish This latest edition offers completely new and unpublished puzzles, provided by the puzzle suppliers to The Times, and are of the highest quality. So sharpen your wits and prepare to get solving - the only question is: can you make it to the end?

Population Explosion and Other Mathematical Puzzles is a wonderful addition to Dr Dick Hess's previous successful books, Mental Gymnastics: Recreational Mathematical Puzzles, Golf on the Moon, (Dover Publishing, 2011 and 2014 respectively) and Number-Crunching Math Puzzles (Puzzlewright, 2013), a republication of All-Star Mathlete Puzzles (Sterling Publishing, 2009). In this latest volume, there are 116 recreational mathematical puzzles and problems that will challenge and entertain bright minds. They are mostly new problems on creative themes, encompassing a wide range of difficulty from amusing to complex. Intended to hone mathematical thinking skills and reasoning ability, solving the puzzles may require considerable perseverance.Open this book to find a captivating assortment of geometric, digital, logical, probability, analytical, physics and trapezoid puzzles. Find out what happens with jeeps in the desert and be amused or confused by some MathDice puzzles.While most of these puzzles can be solved by pencil and paper analysis, there are some that are best tackled with a computer to find a solution. Be prepared to keep your wits about you!

Population Explosion and Other Mathematical Puzzles is a wonderful addition to Dr Dick Hess's previous successful books, Mental Gymnastics: Recreational Mathematical Puzzles, Golf on the Moon, (Dover Publishing, 2011 and 2014 respectively) and Number-Crunching Math Puzzles (Puzzlewright, 2013), a republication of All-Star Mathlete Puzzles (Sterling Publishing, 2009). In this latest volume, there are 116 recreational mathematical puzzles and problems that will challenge and entertain bright minds. They are mostly new problems on creative themes, encompassing a wide range of difficulty from amusing to complex. Intended to hone mathematical thinking skills and reasoning ability, solving the puzzles may require considerable perseverance.Open this book to find a captivating assortment of geometric, digital, logical, probability, analytical, physics and trapezoid puzzles. Find out what happens with jeeps in the desert and be amused or confused by some MathDice puzzles.While most of these puzzles can be solved by pencil and paper analysis, there are some that are best tackled with a computer to find a solution. Be prepared to keep your wits about you!

'The collection contains many delightful and enjoyable problems that are either original or taken from old books, which are no longer easily accessible. I especially like the detailed solutions, which make it clear that the author has carefully re-examined all the old problems and often discovered that the previously published solutions were incomplete. Some problems are best solved with the help of a computer, and can serve as original exercises in computer programming. The book provides an enjoyable read, and should not be missing in the library of any metagrobologist.'zbMATHDefinition of metagrobolize: puzzle, mystify; puzzle out. Hence, metagrobology is the study of puzzles and metagrobologist an expert in such study. David Singmaster is possibly the world's best known metagrobologist. He gained prominence in the 1980s with a booklet on how to solve the Rubik's Cube.This book is a collection of over 200 problems that David Singmaster has composed since 1987. Some of the math problems have appeared in his various puzzle columns for BBC Radio and TV, Canadian Broadcasting, Focus (the UK popular science magazine), Games and Puzzles, the Los Angeles Times, Micromath, the Puzzle a Day memo pad and the Weekend Telegraph. While some of these are already classics, many of the puzzles have not been published elsewhere previously.Puzzle enthusiasts of all ages will find here arithmetic problems, properties of digits; monetary problems; alpha-metics; Diophantine problems; magic figures; sequence problems; logical problems; geometric problems; physics problems; combinatorial problems; geographic problems; calendar problems; clock problems; dissection problems and verbal problems.Can you solve it? Are you smarter than a metagrobologist? Check out Alex Bellos's Monday Puzzle on The Guardian as he features two sequence puzzles from the book.

Challenge your brain at home with these enjoyable puzzles. Specially compiled to provide the most deadly Su Doku challenge, this is the only volume for Su Doku enthusiasts who need a puzzle that really tests their mettle. Prepare yourself for the toughest Su Doku challenge there is. These diabolically difficult Ultimate Killer Su Doku puzzles will really put your brainpower to the test as you 'warm up' with the 100 Deadly Killer puzzles before steeling yourself to take on the 100 Extra Deadly Su Dokus. Are you ready for the challenge? Not for the faint-hearted. The puzzles use the same 9x9 grid as a regular Su Doku, but have an extra mathematical element that multiplies the challenge. The aim is not only to complete every row, column and cube so that it contains the digits 1 to 9, but also to make sure that the outlined sections, called cages, add up to the number given in each cage. Warning: Not suitable for amateur puzzlers!

Just when you thought it was safe to pick up a pencil

Killer Su Doku is based on the original Su Doku grid, with the same rules and numbers--1 to 9--but with an added deadly twist. This time there is an element of arithmetic involved and there are few, if any, clues. The aim is to not only complete every row, column, and cube so that it contains the digits 1 to 9, but to also fill in the outlined cubes so they add up to the same number.

Hints to solve the puzzle are hidden in the joined squares where only one combination of numbers applies. In the case of joined squares, if the printed number is 3, it should be 1 and 2 that go into the squares. Likewise, in the case of three joined squares, if the printed number is 6, the only combination possible is 1, 2, and 3.

To add one final fiendish level, each puzzle also has a time worked out by its Japanese creators so you can try to beat the clock.

This beautiful 500-piece jigsaw puzzle features art by beloved bestselling author Katie Daisy and comes in a matching canvas pouch that's easy to store or tote on the go. With artwork that will immerse you in nature's magic, this handy puzzle makes for a lovely mental escape and perfect grab-and-go entertainment for family getaways.

In 2008, November 23-28, the workshop of "Classical Problems on Planar Polynomial Vector Fields " was held in the Banff International Research Station, Canada. Called "classical problems", it was concerned with the following: (1) Problems on integrability of planar polynomial vector fields. (2) The problem of the center stated by Poincare for real polynomial differential systems, which asks us to recognize when a planar vector field defined by polynomials of degree at most n possesses a singularity which is a center. (3) Global geometry of specific classes of planar polynomial vector fields. (4) Hilbert's 16th problem. These problems had been posed more than 110 years ago. Therefore, they are called "classical problems" in the studies of the theory of dynamical systems. The qualitative theory and stability theory of differential equations, created by Poincare and Lyapunov at the end of the 19th century, had major developments as two branches of the theory of dynamical systems during the 20th century. As a part of the basic theory of nonlinear science, it is one of the very active areas in the new millennium. This book presents in an elementary way the recent significant developments in the qualitative theory of planar dynamical systems. The subjects are covered as follows: the studies of center and isochronous center problems, multiple Hopf bifurcations and local and global bifurcations of the equivariant planar vector fields which concern with Hilbert's 16th problem. The book is intended for graduate students, post-doctors and researchers in dynamical systems. For all engineers who are interested in the theory of dynamical systems, it is also a reasonable reference. It requires a minimum background of a one-year course on nonlinear differential equations.