Competitive exams of today are virtually a race against time. The candidate is expected to perform an incredible amount of mathematical work in a very short time. The time available for sorting out one question ranges from 0.25 to 0.75 minute. Given such a scenario, traditional methods of solving questions seem anachronistic – outdated, to put it simply. A new approach is the need of the hour – an approach that is speed-oriented and yet simple to follow and apply. It is with this one and only objective in mind that the author has prepared this book. The book covers every type and variation of the problems that are asked in today’s competitive exams. Short-cut methods have been presented and illustrated. Although several copycats have emerged over the years, this book remains the best in its genre. The book is profusely illustrated. Avoiding the temptation for haste and ending up with a cook-book, the author put in two years of intensive effort and research. Ideas have been taken from available study materials, number theory, readers’ suggestions and, finally, Vedic Mathematics. This book is a boon for the aspirants of today’s competitive exams, irrespective of their background – whether they come from Arts, Science or Commerce stream. Concepts have been clarified so that if one has been even vaguely familiar with them earlier, as in the case of non-mathematics students, understanding will not be a problem. Direct formulae are beneficial for one and all. They save time, and time is precious for everyone.