Using a dialogue approach, award-winning international bestselling author Paul Chika Emekwulu explores the rules of divisibility of whole numbers in "Divisibility Rules of Whole Numbers Made Simple." The book covers the rules of divisibility by 2, 3, 4, 5, 6, 8, 9, 10, and 11. Each chapter begins with an introduction, previous knowledge, and a set of objectives to guide the reader in the lesson. Exercises, chapter summaries, and s search for counter examples close each chapter, aiding the reader's comprehension of the material. The author uses algebra - in some cases, in addition to arithmetic - to investigate why each divisibility rule works. The investigations are interesting, and you will enjoy them when you eventually discover that just memorizing the divisibility rules is not enough.The characters in each dialogue include the classroom teacher, Mrs. Adeyinka, Adeyemi, Ajalla, and Adedeji. These are all imaginary including the school, a Teachers' Training College in Gboko, Benue State, Nigeria.