This “enjoyable” biography of the brilliant astronomer will intrigue young people who are “bored with the textbook approach to science” (The New York Times Book Review). Sixteenth century Italy produced Galileo, a genius who marked the world with his studies and hypotheses about mathematical, physical, and astronomical truths. His father, musician Vincenzio Galilei said, “Truth is not found behind a man’s reputation. Truth appears only when the answers to questions are searched out by a free mind. This is not the easy path in life but it is the most rewarding.” Galileo challenged divine law and the physics of Aristotle, and questioned everything in search of truths. And it was through this quest for truth that he was able to establish a structure for modern science.

Martin Gardner's Mathematical Games columns in Scientific American inspired and entertained several generations of mathematicians and scientists. Gardner in his crystal-clear prose illuminated corners of mathematics, especially recreational mathematics, that most people had no idea existed. His playful spirit and inquisitive nature invite the reader into an exploration of beautiful mathematical ideas along with him. These columns were both a revelation and a gift when he wrote them; no one--before Gardner--had written about mathematics like this. They continue to be a marvel. This volume is a collection of Irving Joshua Matrix columns published in the magazine from 1960-1980. There were several collections of Dr. Matrix, the first in 1967; they were revised as Gardner reconnected with the good doctor over the years. This is the 1985 Prometheus Books edition and contains all the Dr. Matrix columns from the magazine.

If you found maths lessons at school irrelevant and boring, that’s because you didn’t have a teacher like Bobby Seagull. ***As seen on Monkman & Seagull's Genius Guide to Britain*** Long before his rise to cult fandom on University Challenge, Bobby Seagull was obsessed with numbers. They were the keys that unlocked the randomness of football results, the beauty of art and the best way to get things done. In his absorbing book, Bobby tells the story of his life through numbers and shows the incredible ways maths can make sense of the world around us. From magic shows to rap lyrics, from hobbies to outer space, from fitness to food – Bobby’s infectious enthusiasm for numbers will change how you think about almost everything. Told through fascinating stories and insights from Bobby’s life, and with head-scratching puzzles in every chapter, you’ll never look at numbers the same way again.

Quickly and accurately calculate key investment ratios Written by a leading finance expert, this book offers simple explanations on how to calculate and interpret key financial ratios. This information is essential for the accurate assessment of a company's financial condition and the true value of its shares. This book is packed with many worked examples from actual company reports and readers will also find many online reference sources-including company Web sites and free software offers. Plus, this book features a supporting Web site at www.magicnumbersbook.com. Magic Numbers is essential reading for individual investors and non-financial executives.

From Costa Children's Book Award winner and multi-million bestselling author Sally Gardner, comes the MAGICAL CHILDREN story about a boy who's magic with numbers. When Billy Pickles' dad leaves home to live in New York, he gives Billy a moneybox. Billy's not sure where to put in the money, and not sure why his dad has left. Then Billy goes to New York to visit his father and his Italian grandmother, and discovers the secret of his magic moneybox. In a wonderful adventure, he takes Mighty Mamma on a helicopter ride, cracks open a safe, solves a kidnap mystery - and gets to know his dad again.

A key challenge sales professionals confront is how to measure the various activities they perform in the sales planning, selling and execution, and post-sales review phases of the customer relationship. Magic Numbers for Sales Management: Key Measures to Evaluate Sales Success is a ready-reference for sales and marketing professionals who seek clear descriptions of over 50 of the most important sales metrics and formulas. Using clear descriptions and relevant examples from many of today’s leading companies, sales and marketing professionals will learn relevant measurement and evaluation techniques, including: Important metrics for measuring market conditions, sales forecasting, compensation, quotas, sales force-size, pricing, and customers Applying metrics to different phases of the selling process Key behaviors of the most successful sales people Magic Numbers for Sales Management is an important resource for the most demanding sales professionals who want to fully assess the success of their selling activities.

Magical see-through pages flip back and forth to mix and reveal counting surprises.

This book simply outlines a range of the key measures that any HR , financial or business manager can use to address this situation in a more business-like manner. For each definition, there is not only a description of the measure but also why it has vital significance to managing business better. It is written as a basic text book in easy to read language but with a powerful underlying message - HR managers must measure the main features of HR in order to get their voice heard at the executive table and make demonstrable impact on business operations.

A meditation on the beauty and meaning of numbers, exploring mathematical equations, describing some of the mathematical discoveries of the past millennia, and pondering philosophical questions about the relation of numbers to the universe.

"The Magic of Numbers" was written with two goals in mind: first, to introduce the reader to some of the beauty of numbers--the patterns in their behavior that have fascinated mathematicians for millennia, and some surprising applications of those patterns; second, and equally important, to teach the reader something of the mathematical mode of thought: the feeling of exploration, excitement, and discovery that are part of how mathematics is developed. The book, written originally for the course Quantitative Reasoning 28 that the authors developed and taught at Harvard, draws the reader into the content through an engaging and informal writing style. Example-driven, it reduces to a minimum the abstract notation and formal argument that often creates a barrier between mathematicians and students, focusing more instead on the experimental aspect of the subject. Above all, the authors communicate to the reader a sense of the joy and fascination of learning mathematics. Additional exercises, problems, and sample exams are available at: www.prenhall.com/gross Principal topics include: Counting and basic combinatorics, with applications to probability and games The arithmetic of natural numbers: the Euclidean Algorithm and the unique factorization theorem Modular arithmetic, including Fermat's Theorem, Euler's Theorem, and how to take powers and roots Codes: how the special properties of ordinary and modular arithmetic in combination allow us to construct the public-key codes that help make data transmission secure.