This unique book will help master your problem-solving skills. It contains more than 200 Non-Standard-Problems (NSP), puzzles, and tests, which can be solved by using creative thinking instead of formulas or predefined steps. For most problems, you do not need to know any advanced mathematics or have any specialized knowledge. For a few of the problems that are about the chances of something happening, you might need some limited knowledge about probabilities, provided for your convenience in the Appendix. This book will help you develop and master your critical, "out of the box" thinking. Most problems are new, but some were inspired by well-known problems. The book includes jokes and funny tests that make it enjoyable to read not only for adults but for children as young as 10. It is written in a fashion that is easy to understand. Don't give up quickly, but if you are out of ideas on how to solve particular problems, check out the solutions sections for comments and useful hints. As you work through the book, this will help you solve the next round of problems. Dr. Alexander Tetelbaum is a well-known scientist, inventor, educator, and entrepreneur, who has honed his own problem-solving skills over the years. Natalie Heroux is a well-known industry executive who has wide experience in applying NSP solving to real-life business problems. We wish to express our gratitude to our friend Dr. Theodore Bickart for his constructive input. We want to praise Lauren Bickart for her superb editing of the book.

A fascinating exploration of the limits of human knowledge of our planet, its history and culture, and the universe beyond, from the author of The Things that Nobody Knows There are many, many more things that nobody knows. Do animals have a sense of humor? Why do we have five fingers? How long can humans live? What did Jesus do in his youth? Which speech did Lincoln deliver at Gettysburg? Does the appendix have any use? Is there an odd perfect number? In this witty and enlightening follow-up to The Things that Nobody Know s, William Hartston takes us on a guided tour of 501 further gaps in our knowledge of cosmology, mathematics, animal behavior, medical science, music, art, and literature.