The Worlds 200 Hardest Brain Teasers

FLEX YOUR brain power like never before! From acclaimed author Dr. Gary Gruber, whose proven critical-thinking methods have sold more than seven million books, this collection of mind-bending brain teasers is sure to challenge even the most experienced problem solver. Inside are logic puzzles, riddles, maddening math problems, mental games, and more! A ship is twice as old as the ship's boiler was when the ship was as old as the boiler is. The ratio of the boiler's age now to the ship's age now is what? What English word contains all the vowels, in alphabetical order? What is the three-digit number that can be made from the digits 2, 3, 5, and 7 where no two digits in the three-digit number are alike, and where the three-digit number is a multiple of each of the digits chosen? Stumped? Dr. Gruber reveals the fascinating explanations and detailed strategies for solving even the trickiest problems using his exclusive Gruber Method. DISCLAIMER: The brain teasers in this book may get you so wrapped up in critical thinking that you may not be able to do your regular work until you solve them! Any abrupt or gradual increase in creativity, intelligence, or motivation to get a better job suited to your newfound talents is strictly the reader's responsibility. For more than thirty years, Gary R. Gruber, PhD, has been recognized as a leading expert on the SAT, test-taking methods, and critical-thinking skills. His methods have been used by PBS, Sylvan Learning Centers, Grolier's Encyclopedia, and school districts throughout the country. Dr. Gruber's innovative problem-solving strategies make up the heart of the new MyMaxScore's online test prep (www.mymaxscore.com).

This compilation of long-inaccessible puzzles by a famous puzzle master offers challenges ranging from arithmetical and algebraical problems to those involving geometry, combinatorics, and topology, plus game, domino, and match puzzles. Includes answers.

A brain teaser is a form of puzzle that requires thought to solve. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves lateral thinking. Logic puzzles and riddles are specific types of brain teasers. Puzzles and brainteasers can be found throughout history and around the world. This book collects the most popular and challenging mind benders for hours of fun-filled entertainment that helps sharpen your logic, language, and problem-solving skills. Fun for everyone. You don't need any special skills to solve these puzzles, and clues and answer keys help you if you get stumped. 5 Challenge levels. Each section gets harder as you move through the book, so you can push your limits, or find puzzles the whole family can try. Hints of history. Every time you tackle a new puzzle, you'll learn fun facts about where it comes from and how long it's been around. Solving logic problems boosts brainpower, keeps your memory strong, and entertains everyone to no end. See how many you can figure out--without cheating!

What's challenging, fun, and sure to give your brain a workout? This riddle book for kids ages 9-12! Riddle me this—can you solve these super hard word puzzles? You sure can! Featuring nearly 200 brain benders, this riddle book for kids ages 9-12 is the ultimate option for clever children who love thinking outside the box. This big riddle book for kids ages 9-12 will test the limits of your imagination. Start things off with handy tips and simple warm-up riddles that will help you twist your thinking and get creative. What's the difference between a bird and a fly? Tie your brain in knots and find out inside! Tons of tough riddles—Build your problem-solving abilities and stretch your creative thinking skills as you unravel all kinds of perplexing puzzles. Learn about history's biggest puzzlers—Try your hand at some of the world's most famous riddles, like the Riddle of the Sphinx or Bilbo's riddle from The Hobbit, while also learning fun facts about their history. Easy to use—Tips, hints, and an organized answer key in the back make it easy to get solving with your friends and family anytime. Overcome the mind-blowing mysteries inside the very best riddle book for kids ages 9-12!

You can be sitting in the train working on a puzzle but it can take you far away from the everyday. Before you know it you're at your stop or about to pass it. It's not like you were even in the train. It's something different, something removed from the ordinary." --Maki Kaji, Japanese Times The Nation's No. 1 Newspaper offers puzzlesmiths the ultimate cranium compendium boasting five challenging mind teasers. USA TODAY is America's most recognized newspaper reaching more than 5 million people each day. Now, USA TODAY has collected five popular game formats into one book, including: Logic Puzzles, Crossword, Killer Sudoku, and Hitori. Complete with 400 puzzles (that's twice the size of comparable game books), USA TODAY Jumbo Puzzle Book includes an introductory chapter that offers solution tips as well as a concluding chapter that reveals all the answers. Pen and pencil puzzles are big business. According to a national poll by the American Society on Aging, 84 percent of people report that they spend time daily in activities that are good for brain health.

This book contains exercises connected with some of the fun or more unusual aspects of the English languageand with games that typically a native English speaker would do. The games have been adapted into a manageable format, but the actual vocabulary contained has not been changed. The types of games include: lateral thinking games, riddles, logic tests, anagrams, palindromes, proverbs, limericks, word ladders, tongue twisters, plus a whole host of other word-related games. Easy English! is a series of books to help you learn and revise your English with minimal effort. You can improve your English by reading texts in English that you might well normally read in your own language e.g. jokes, personality tests, lateral thinking games, wordsearches. doing short exercises to improve specific areas grammar and vocabulary, i.e. the areas that tend to lead to the most mistakes - the aim is just to focus on what you really need rather than overwhelming yourself with a mass of rules, many of which may have no practical daily value Other books in the Easy English!series include: Wordsearches: Widen Your Vocabulary in English Test Your Personality: Have Fun and Learn Useful Phrases Word games, Riddles and Logic Tests: Tax Your Brain and Boost Your English Top 50 Grammar Mistakes: How to Avoid Them Top 50 Vocabulary Mistakes: How to Avoid Them

How well do you think logically? Find out with these puzzles. But don't forget the degree of difficulty increases as you go.

The inside track on how to beat the "logic puzzle" job interview As if job interviews weren't nerve-wracking enough, many companies, in their pursuit of the brightest and best, have begun beleaguering applicants with tests of logic, creativity, and analytical abilities. Many firms have replaced traditional interview questions such as "Tell us about yourself" or "What's your biggest weakness?" with mind-benders such as: Why are beer cans tapered at both ends? How many piano tuners are there in the world? How many Ping-Pong balls can you stuff into a Boeing 747? How would you design a bathroom for the CEO of the company? If you could remove any one of the 50 U.S.states, which one would it be? In How to Ace the Brain Teaser Interview, bestselling careers author John Kador gives readers the inside track on this new interview technique. He provides 75 puzzles actually used by HR departments across the nation, and he offers tips on how to solve them and present the solutions so as to make the best possible impression.

This title is part of the Elegant Puzzle series which has attractive covers with an elastic binding strap. They're portable and convenient, and make great gift items. Packed with 200 puzzles, this book ensures that devoted puzzle fans will be kept entertained for hours. A brainteaser is a puzzle that requires thought to come to a solution. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves creative thinking and logic that is anything but step-by-step. The logic puzzles and riddles in this beautifully packaged, compact softcover edition of Brainteasers will keep thinkers busy for hours and sharpen the wits of anyone who attempts to solve them all. This elegant edition has a lively design and a handy binding strap, and makes an excellent gift for anyone who enjoys mental challenges.

A great way to have fun and build brain power, Brain Teasers offers a variety of games to delight and challenge even the most advanced puzzler. Brain Teasers shows off some outrageously fun new mindbenders, like anasearches (a combination of an anagram, a crossword, and a word search), numberlockers (think of a crossword puzzle with numbers instead of words), and alphabetics (a miniature crossword puzzle that uses each letter of the alphabet exactly once). Perfect for anyone who sits down with the New York Times crossword puzzle every morning or works through Sudoku puzzles on the way home, this book is guaranteed to excite your mind and jump-start your brain.