Hi, Till you secure required score, you should take tests. More number of tests you take, more score you will obtain and you know your level of understanding the concepts and solving problems. You know how much you have learnt and how much you have to work hard. You identify the difficult areas that you have to concentrate. First start with Chapter wise tests daily to understand concepts and then take up test series to assess your level among your peer. Taking a greater number of tests is very important to score better and crack JEE or NEET. You can join a good Coaching centre which can clear your doubts and hold good number of tests. Hope this helps.