To read and enjoy this book it will suffice to possess a modest knowledge of mathematics, knowledge of arithmetical rules and elementary geometry. Very few problems require the ability of forming and solving equations, and the simplest at that. The subjects range from a motley collection of conundrums and mathematical stunts to useful practical problems on counting and measuring. The author has done everything to make his book as fresh as possible, avoiding repetition of all that has already appeared. The reader will find a hundred or so brain-teasers.