In today's world, the use of numbers grows by the day, and we depend on them for so much. This book contains a series of lists that contain information about numbers and their use in society. They will be most useful to those with a quizzical nature but should be of general interest to all. 'Schrödinger's cat' was an infamous and cruel thought experiment dreamt up in the last century to expose one of the mistaken ideas current in science at that time. Since escaping from the box Felix has taken up writing and, in collaboration with retired water engineer Pyotr Stilovsky, he has compiled this factual compendium.