Beat this: children must find up to 100 differences in each "odd one out" puzzle in record time! It's not easy to solve them--but it's such a thrill, kids will keep coming back for more. When completed, favorites can be colored, too.

"There is mental entertainment, magic, math, and more in this collection of classic tricks and problems."-Student Library Journal. Although referring to Townsend's 'The World's Most Challenging Puzzles,' this quote is applicable to his entire puzzle cannon. If you enjoy pitting yourself against the most challenging puzzles in existence and are a glutton for punishment, then one or all of these books are for you. Take your pick among 'The World's Trickiest,' 'Most Perplexing,' 'Most Incredible,' 'Greatest,' 'Most Amazing,' 'Most Baffling,' 'Most Challenging,' and 'Best.' Choose from any of the eight, or all eight, and see how you stand up against Charles Barry Townsend-'the Professor of Perplexing Puzzles." 128 pages, 100 b/w illus., 5 3/8 x 8 1/4.

The noted expert selects 70 of his favorite "short" puzzles, including such mind-bogglers as The Returning Explorer, The Mutilated Chessboard, Scrambled Box Tops, and dozens more involving logic and basic math. Solutions included.

A collection of seventy illustrated logic puzzles set in fantastic locales such as outer space or mythical kingdoms, with explanations of the logical reasoning needed to solve them. Includes charts, grids, diagrams, a section of clues and an answer section.

Numbers can be fun! You will find math puzzles everywhere; in pizzas, mirrors, bicycles, candy, ice creams; even in a pirate's treasure and ancient pyramid. Start simple: imagine you have got six pink socks and six yellow socks in a drawer. How many must you take out to get a pair? Then suppose you've got six pairs of pink gloves and six pair of yellow ones. Now how may do you have to take out to get a pair? Look carefully, the question's harder than you think! You will be burning up those brain cells in no time and challenging all your friends to a game of wits.

Over 4,000,000 Highlights Hidden Pictures books sold! With more than 100 amazing nature scenes to explore, this Hidden Pictures book is a delightful addition to any young solver’s collection. Explore our incredible planet through this Hidden Pictures nature puzzle book! Featuring illustrations of gorgeous landscapes, wild critters and other intricate nature-themed scenes, these iconic black-and-white puzzles have over 1,800 hidden objects tucked away for kids to discover. This book is sure to delight every adventurous, nature-loving kid. A great gift for puzzlers 6-12, every 144-page Highlights Hidden Pictures puzzle book is packed with black-and-white illustrations in a variety of engaging art styles. Perfect for screen-free entertainment on rainy days, road trips and more, Hidden Pictures activity books for kids are carefully designed to engage children while helping them develop their attention to detail and concentration skills. They’re easy to take on the go to keep kids entertained with age-appropriate challenges and Highlights’ signature silliness. Plus, every puzzle doubles as a coloring page!