This book covers concepts in Arithmetic, Elementary Algebra, Euclidean Geometry and Plane Trigonometry. The book is organized into four major sections, each dealing with the concepts in a specific topic. The student may use this as a ready reckoner aid in test preparation or with home assignments. The concepts are uncovered gradually in some sense like LEGO blocks one piece at the time. We have tried to begin at the very beginning and go to the very end [Alices Adventures in Wonderland, Lewis Carroll]. The gradation is gentle, yet challenging. Children must understand and explore the music in the language of numbers and symbols the associated manipulations. This ensures that the child is motivated and stays motivated. We sincerely hope that the student is able to get a good grasp of the subject and the techniques after using this book for meeting his regular academic needs.