A quick reference and a tool that helped so many is written in a simple and clear way to aid students, tutors, and anyone who is interested. This book is designed for you if you are taking a math class but have forgotten some topics from your previous courses and want to refresh your knowledge quickly and painlessly (you might even learn some new techniques and methods that were not covered in your class, and using this book as a reference, you can save time, avoid frustration, and easily succeed in your class); - tutoring students who come for help from a wide range of classes and you yourself need to recall how to solve a certain type of problem and find a clear way of explaining this solution to others; - reviewing topics for the SAT, ACT, GRE, GMAT or other standardized test and need a convenient and concise reference that you can use for your preparation. Even though this book covers a great number of topics starting from those that belong to the developmental math courses and ending with those usually studied in beginning calculus courses, its style is informal. We use easy-to-understand, descriptive examples and a number of visual illustrations. Typical problems are worked out in simple detail. The book is conveniently divided by the topic chapters. For example, Chapter 3 is called Equations and includes all types of equations from Linear to Logarithmic and also how to approach word problems.