The book is about demythologizing the minds that think that mathematics without the use of calculator is difficult. Mathematics is therapeutic, therefore this book offers you that therapy that your mind just needs when it comes to mathematics without a calculator. This book helps both the teacher and the learner to develop the ability in critical,logical and analytical thinking when dealing with problem. This book is not only useful to teachers of mathematics but also to those who are intending to do research work because the book explains how to accept or reject the hypothesis of the study and how to analyze the results.