This book is useful for those who are preparing for those screening or entrance written exams in which the section on Quantitative Aptitude features as an important constituent. The book has been arranged into 23 chapters, each on a topic from which considerable number of questions are set in such competitive exams. These chapters are essentially unsolved question banks and contain questions ranging from ten to thirty. Extreme care has been taken to include diverse problems on a particular topic. The book ends with a Comprehensive Test which includes questions from each of the foregoing chapters.