This book is a collection of 57 very challenging math problems with detailed solutions. It is written for anyone who enjoys pondering difficult problems for great lengths of time. The problems are mostly classics that have been around for ages. They are divided into four categories: General, Geometry, Probability, and Foundational, with the Probability section constituting roughly half the book. Many of the solutions contain extensions/variations of the given problems. In addition to the full solution, each problem comes with a hint. For the most part, algebra is the only formal prerequisite, although a few problems require calculus.Are you eager to tackle the Birthday Problem, Simpson's Paradox, the Game-Show Problem, the Boy/Girl Problem, the Hotel Problem, and of course the Green-Eyed Dragons? If so, this book is for you! You are encouraged to peruse the problems via either the Look Inside feature on Amazon, or the author's Harvard webpage (where all of the problems are posted), to gauge whether the level of difficulty is right for you.

"Silly and bright with slapstick humor…. this book's subject matter has perennial—and engaging—interest."—​School Library Journal Be careful what you wish for—​again! This follow-up to You Don't Want a Unicorn! by New York Times bestselling author Ame Dyckman and beloved illustrator Liz Climo points out the hilarious mishaps that come with adopting a dragon. Our protagonist wishes (much to the narrator's continued chagrin) for a pet dragon. Though initially thrilled, the kid quickly discovers that dragons aren't quite as awesome as they originally thought. From the scooting to the digging to the fire-breathing, our Kid is dismayed that they still haven't found their perfect pet. Little do they know, that pet might just be right around the corner . . . Don't miss some of these favorite Ame Dyckman titles: Wolfie the Bunny Horrible Bear! How Dinosaurs Went Extinct: a Safety Guide You Don't Want a Unicorn!

Fun, humour, battles, sentient dragons, betrayal, heroism, a little romance, more dragons - what more could you ask for? Eleanor is a serious, intelligent teenager with a slightly bonkers mother. She is also a Time Strider and a Dragon Slayer. When the time tracks align, Catherine - the Time Interpreter shows Eleanor the route to her destiny where she must leave childhood and comforts behind and fight for the survival of strangers who exist in a time loop. The Man Betrayer has taught the higher dragons to speak. No longer individual menaces, the creatures communicate, plot and join with more sadistic allies. When the she-devil - Maligna Satana, teams up with Brute Festeral - giant bull dragon and Doom Bringer of the Cold Lands, it seems that the Dragon Slayers who have so far protected Moreth will be defeated. Eleanor has unreliable help from the mathmagicians - otherwise known as Enquates - creatures who exist in each other's mind spaces. In the course of her heroic adventure, Eleanor finds a clue to her own identity, past and future.

"Book of Monsters: Portraits and Biographies of a Few of the Inhabitants of Woodland and Meadow" by David Fairchild and Marian Fairchild David Grandison Fairchild was an American botanist and plant explorer. With his wife, Marian, he wrote this collection of biographical sketches of animals, bugs, and plants that live in the woods. The pictures in this book are portraits of creatures which are as much the real inhabitants of the world as we are, and have all the rights of ownership that we have, but, because their own struggle for existence so often crosses ours, many of them are our enemies. Indeed, man's own real struggle for the supremacy of the world is his struggle to control these tiny monsters.

From the author of The Monsters Know What They’re Doing comes an introduction to combat tactics for Dungeons & Dragons players. In his first book, The Monsters Know What They’re Doing (based on his popular blog), Keith Ammann unleashed upon the D&D world a wave of clever, highly evolved monster tactics. Now it’s only fair that he gives players the tools they need to fight back…and prevail! An introduction to combat tactics for fifth-edition Dungeons & Dragons players, Live to Tell the Tale evens the score. It examines the fundamentals of D&D battles: combat roles, party composition, attacking combos, advantage and disadvantage, Stealth and Perception, and more…including the ever-important consideration of how to run away! Don’t worry about creating a mathematically perfect character from square one. Survival isn’t about stats—it’s about behavior! With four turn-by-turn, roll-by-roll, blow-by-blow sample battles, Live to Tell the Tale breaks down how to make the best choices for your cherished characters so that they can survive their adventures, retire upon their accumulated riches, and tell stories about the old days that nobody will ever believe.

From the creator of the popular blog The Monsters Know What They’re Doing comes a compilation of villainous battle plans for Dungeon Masters. In the course of a Dungeons & Dragons game, a Dungeon Master has to make one decision after another in response to player behavior—and the better the players, the more unpredictable their behavior! It’s easy for even an experienced DM to get bogged down in on-the-spot decision-making or to let combat devolve into a boring slugfest, with enemies running directly at the player characters and biting, bashing, and slashing away. In The Monsters Know What They’re Doing, Keith Ammann lightens the DM’s burden by helping you understand your monsters’ abilities and develop battle plans before your fifth edition D&D game session begins. Just as soldiers don’t whip out their field manuals for the first time when they’re already under fire, a DM shouldn’t wait until the PCs have just encountered a dozen bullywugs to figure out how they advance, fight, and retreat. Easy to read and apply, The Monsters Know What They're Doing is essential reading for every DM.

" ... offer[s] a challenging exploration of problem solving mathematics and preparation for programs such as MATHCOUNTS and the American Mathematics Competition."--Back cover