Strengthen your observational skills by spotting the differences in more than 115 beautiful and interesting picture puzzles!

Brain teasers and puzzles designed especially for teens! They'll love the puzzles. You'll love that puzzles improve their brain and thinking processes! Perfect for kids ages 13-17 with a great variety of teen themed puzzles. (Funny yearbook quotes, high school logic puzzles, school jokes and more!) Contains: Brain Teasers (lateral thinking) Word Searches (help with spelling and vocabulary) Mazes (critical thinking) Fun Quizzes (Adulting skills, Are you competitive?) Find the Difference Logic Puzzle Hidden Pictures Cryptograms Fallen Jokes Rebus Puzzles Whether on a road trip or relaxing at home teens will be entertained and challenged!

60-Second Brain Teasers Pencil-Free Puzzles contains 201 no-pencil-required brain twisters that take one minute or less. These completely original puzzles range from easy to near-impossible!

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!

Discover the adventure and excitement of mathematical puzzles. Match your wits with the human computer. Sharpen your intellect, delight your friends and enjoy hours of purposeful entertainment. Mathematics is not always hard, mind-boggling stuff. It can also be simple, delightful and interesting. Many famous mathematicians are known to be devoted to peg jumping puzzles. It is perhaps this kind of play that leads to scientific discoveries. The celebrity author, Shakuntala Devi, is regarded as 'authentic heroine of the twentieth century'. She calculates faster than the fastest computer, is listed in the Guinness Book of World Records and continues to amaze audiences around the world with her feats of calculation.

** WINNER OF 'STOCKING FILLER OF THE YEAR AWARD' GUARDIAN ** Pit your wits against the people who cracked Enigma in the official puzzle book from Britain's secretive intelligence organisation, GCHQ. 'A fiendish work, as frustrating, divisive and annoying as it is deeply fulfilling: the true spirit of Christmas' Guardian 'Surely the trickiest puzzle book in years. Crack these fiendish problems and Trivial Pursuit should be a doddle' Daily Telegraph If 3=T, 4=S, 5=P, 6=H, 7=H ...what is 8? What is the next letter in the sequence: M, V, E, M, J, S, U, ? Which of the following words is the odd one out: CHAT, COMMENT, ELF, MANGER, PAIN, POUR? GCHQ is a top-secret intelligence and security agency which recruits some of the very brightest minds. Over the years, their codebreakers have helped keep our country safe, from the Bletchley Park breakthroughs of WWII to the modern-day threat of cyberattack. So it comes as no surprise that, even in their time off, the staff at GCHQ love a good puzzle. Whether they're recruiting new staff or challenging each other to the toughest Christmas quizzes and treasure hunts imaginable, puzzles are at the heart of what GCHQ does. Now they're opening up their archives of decades' worth of codes, puzzles and challenges for everyone to try. In this book you will find: - Tips on how to get into the mindset of a codebreaker - Puzzles ranging in difficulty from easy to brain-bending - A competition section where we search for Britain's smartest puzzler Good luck! 'Ideal for the crossword enthusiast' Daily Telegraph

Do you like riddles? Do you like brain teasers? Do you like puzzles? Are you a problem solver? Are you creative? Do you think outside the box? If you can answer yes to any of these questions, this book may be perfect for you. Introducing a collection of the best riddles, puzzles, and brain teasers that has been years in the making. These will challenge the way you think, introduce you to new ways to look at problems, and expand your mind. People who love riddles, puzzles, and brain teasers are familiar with the rush of the "aha!" moment, the "that's it!" moment, that "of course!" moment, the moment of clarity that you get when the lightbulb goes off and you've figured it all out. Those moments are great exercise for your mind and brain and will help to keep you mentally sharp. Even if you are new to riddles, puzzles, and brain teasers this book will be a fun and exciting read; it will help you become a better problem solver and become more comfortable with thinking outside the box. The puzzles in this book range in difficulty from light & easy to hard to very hard and will provide a challenge for even the sharpest mind. There are discrete reasoning riddles, mathematical reasoning riddles, practical reasoning riddles, and some classical logic riddles as well, along with the old school problem-solving puzzles that you might have come across in school. There is no word play, the puzzles have definite and satisfying answers, and some of them will blow your mind. In this book you will be figuring out how to cross bridges, how to escape from prison cells, how to steal rope, how to shoot cyborgs, how to transport bananas through the desert, how to figure out the color of a hat you have on, how to turn on lightbulbs, and how to save a ton of prisoners from being executed! Enjoy it! ...and remember, once you peek at the solution you will never be able to unsee it!