Quicker maths is a very good book for all those aspirants who are preparing for any type of competitive examination. It has all shortcuts and formula that will help you to solve the problem very quickly within seconds. It will save a lot of your time in exams. But before using this book your concept on that chapter should be clear.
One of my friend suggested me to buy this book. I studied it but still was not able to solve the problem. Then I started solving the problem without applying the formula. Once I was good in that chapter, then I applied the formula and it worked.
So always first solve the problem without formula and then with formula by using this book.
Thank you.