Der 12-beinige Esel. 93 mathematische Rätsel mit ausführlichen Lösungen

How many legs does a donkey have? Four? No! It has two in the front, two in the back, two on the right, two on the left, and one at each of the four corners, making a total of twelve! Not all mathematical riddles (and a few of them are included here) are so easy to uncover. For some, you really have to get your mind working! However, all the problems in this book can be solved with just a bit of knowledge from school mathematics. After all, it's about entertainment! They come from various fields, including algebra, geometry, logic, and others, and there are detailed solutions at the end for all of them, explaining the background and history of the puzzles.