Unfortunately, math is often the most disliked and least understood subject taught in school.  This usually results from a failure, either on the part of the teacher or student, to appreciate the  practical usefulness of math. Problems are considered merely as "numbers," and the student never  really knows how this information was obtained and can be used in later life. As a result, the  student sees no good reason why they should attempt to understand even the most basic  operations. What does this have to do with taking an exam? The answer is this, without  understanding basic math operations, you cannot hope to pass an exam or be successful in the construction industry.
This book will take you through the many categories of math questions of which an electrician  is required to have knowledge for the electrical exam. I will repeat categories in exams through  out the book.

You cannot excel in a subject if you don't understand it. The key is learning and understanding  a subject. Memory comes from overlearning. You don't forget how to walk or ride a bicycle. Too  many try to cram for a test or to memorize answers from previous exams. This results in failure.

For some electricians, it has been twenty years or more since they have used math formulas. For  most, the last time was an apprenticeship class. Now, for the exam, we are required to be an  expert in applying all of the formulas.