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Improvement in accuracy/percentile takes time and consistent hard work. We advise students to spend at least a couple of hours every day working on their areas of weakness. The most important section in Verbal is RC - proficiency in all other areas of Verbal can be improved if one improves in RC. To improve in RC, initially make a small summary of the RC that contains the gist of the article. After writing the summary, go back and read the article to see if you missed any points. Follow this method consistently for a couple of weeks, and you will find yourself improving in RC.
Apart from this, concentrate on Grammar questions because this is an area where the accuracy can be close to 100%. Most importantly, every time you get a question wrong, do a thorough analysis of where you went wrong in the thought process. Try to incorporate these learnings into your next test/question.
Take a look at these links for practise questions in Verbal Ability:
https://cracku.in/cat/verbal-and-lr
