Arithmetic is among the elementary branches of mathematics. It involves the study of numbers, relations between them, and observations on numbers. These are studied to solve various number problems. Addition, subtraction, division and multiplication are the basic arithmetic operations. Arithmetic generally refers to the elementary aspects of the theory of numbers, arts of measurement, and numerical computation. Counting is the act of determining the number of objects present in a set. The numbers thus obtained are called natural numbers. When no object is present, the count produces the number zero, which added to the natural numbers, comprises the set of whole numbers. This book is a valuable compilation of topics, ranging from the basic to the most complex subjects related to whole numbers arithmetic. Some of the diverse topics covered herein address the varied branches that fall under this category. For all those who are interested in whole numbers arithmetic, this book can prove to be an essential guide.