The Mathematics Handy Guide series is designed to communicate key mathematical concepts in a student-friendly style. These pocket guides are especially useful when studying for tests and examinations. Well, almost everything you would need to know is included. In addition, important notes, examination tips and common mistakes are included in this small and portable vademecum to enhance learning and boost confidence in learning mathematics.
You may have heard about the orange boxes which is found throughout the guides, containing useful tips, notes and words of caution. Here is another orange box not found in the guides which you may find useful:
Caution: If your final answer has to be corrected to three significant figures, you will have to work with at least four in your working.