How could you possibly survive a test that's only a bunch of logic? It's just to make your minds think at this/that time, and to see a thing at a different observation, like how people see the number 6 but others see 9 because they're upside down. If you're having a hard time, a boring time, a lonely time, a sad time, well this book accompanies you! Well, not accompanies much but you will be in this book once you've answer a logic! It's that easy! Also, this book was made very seriously but very fun! Enjoy reading the book of knowledge!