Sharpen your mind with this light and witty collection of 113 brainteasers. Included are the Four Famous Problems, featuring Archimedes’ Cattle Problem, Impossible Division, and apple and unit problems. The puzzles cover a variety of mathematical topics, from distance to measurements, money, speed, time, and more. Problems are primarily solved using the mathematics of daily life — addition, subtraction, multiplication, division, and fractions — plus algebra and clear, logical thinking. Most have solutions — some have more than one, while others are left to the skills of the reader. A delightful treat for any puzzle enthusiast.