Big Brain Workout

"Who is the smartest? The truth will be revealed when you, your friends, and your family have an entertaining competition using these more than 200 brainteasers. The quizzes come in varying levels of difficulty, and each of the nineteen sections starts with a tangram challenge and ends with a score sheet. In between, the intriguing options range from a French picture puzzle from the 1890s (find the two drinkers in the image) to mental conundrums such as this: "Two individuals are born in the same place at the same time. After 50 years, both die, also in the same place. Nevertheless, one of the two lived a hundred days longer than the other. How did this remarkable situation come about? It's fun for everyone. Answer: Both people used to travel around the world once a year. But one traveled westwards and the other eastwards. The person traveling west gained one day on each trip, while the person traveling east lost a day on each trip due to the different time zones. In 50 years, that amounts to 100 days.Botermans, Jack is the author of 'Big Brain Workout', published 2005 under ISBN 9781402722103 and ISBN 1402722109.