If you're looking for fun ways to challenge yourself for hours, The Everything Brain Strain Book is for you! Over 400 puzzles, riddles, brain teasers, and more will test your IQ and improve your thinking and problem-solving skills. Organized by difficulty and type, this all-inclusive game book will keep you guessing. Including: Language puzzles Letter equations Logic puzzles Math and science teasers Probability puzzles Rebuses Riddles Trivia Give up? A Solution Guide in the back of the book is there for you when you've encountered the toughest puzzles of all. Indulge your penchant for puzzles as you face challenge after challenge in The Everything Brain Strain Book.