Who will be the mental arithmetic champion?

Brain jogging in a competitive format – with fun jokers to increase the excitement! Mental arithmetic is 'in' and is required in many tests and examinations. Additionally, it has been proven to enhance concentration, improve memory performance, and is a fundamental prerequisite for all mathematical thinking operations. This extensive two-volume set has a high appeal due to its resemblance to popular quiz shows on television, featuring four answer choices and the option of a joker. The increasing difficulty of the tasks ensures significant learning progress.