Many problems are posed. These are similar to the arithmetic problems of the mid-20th C. of trains traveling at a given speed.... But much more varied: The Spinning Top, How Do You Escape Quicksand? etc.
Solutions at the end of the book. Illustrated with drawings. Glossary. No index. Small print!
Solutions at the end of the book. Illustrated with drawings. Glossary. No index. Small print!
