I don't have no idea about the quantitative aptitude basics n logical reasoning. i am weak in verbal ability how can I improve those sections. .... please suggested basics books

Hai Anil, This is a common weakness for many aspirants. There is nothing much to panic. You need to start with Basic Concepts across all Chapters: Go through all the chapters listed in CAT Syllabus. Then start with Easy Chapters like Percentages, Profit n Loss, etc. first. In every chapter complete the Basics, Formulae & Level 1 questions. Then you can get into tougher Chapters like Probability, P&C, etc. Once you complete all Level-1 questions Practise Level-2. Then you can attempt Sectional tests and Mock tests. Mock tests help you to get familiarized to the pattern of the exam. They help you in getting used to the activity of sitting in one place for hours and attempting the test. Remember you need to be Smart while tackling this section. Employing logical approach, along with important shortcuts, tricks, and formulae will ensure that you solve the problems in a quick & efficient way. Speed also plays a crucial role in performing well in this section. If you take too much time in solving a question, then you will never be able to clear the cut-offs. The more you practice, the faster you become at solving questions. Next coming to LR. It is clubbed with Data Interpretation. A total of 8sets or 32 questions will be tested in this section. Mostly questions will be coming from Arrangements, Games & Tournaments, Puzzles, Set Theory, Venn Diagrams, Network Diagrams, etc. First, you need to have a basic idea of all these areas and then you need to practice extensively. Along with them, you can practice Sudoku puzzles, etc. Remember the key in this section is practice and getting exposed to a wide variety of sets. Books for Quantitative Aptitude: Quantum CAT by Sarvesh K Verma. Must have book for every CAT aspirants. Copy paste the below link. https://amzn.to/2IUPuZV Books for Logical Reasoning: How to prepare for Logical Reasoning in CAT by Arun Sharma https://amzn.to/2ISflBF