After a great success on the German market, this first part of the riddle series is also available in English. The demands on the reader´s creativity and concentration are sometimes very high. Riddle lovers and friends of mental exercise will have great pleasure in solving these tasks. The 6 different categories of riddles require mental flexibility, creative thinking and a high degree of concentration of the reader. Especially, the riddles of logic, the textriddles and geometric riddles are all done individually and repeatedly require special approaches. This requires patience, intelligence, concentration and of course ambition. The mathematical part allows a first familiarization with easy tasks which continuously get much more sophisticated. Have brains, show patience and sophistication. For some riddles, some hints are given (besides the actual solution) in the solution part. That way, you can be guided in the right direction without immediately get to know the solution. Face up to these specific tasks.