I can solve most questions from sample papers at home but I am not able to do the same during mock exams. What should I do please guide me

The most imporatnt factors that lead to ones success in CAT is accuracy in problem solving and the speed with which you do it. I think you are facing the problem of speed while answering your questions. You can adopt this simple strategy at home,use a stop-clock and write down the time you start and leave a question adjacent to the question. After the exam, you may find that you have spent a lot of time on the questions that have not yielded marks.

You should quickly analyse if you can solve a particular question by just reading it once, and if you are not sure of your answer after you read the quastion then you should quickly switch over to the next one without wasting time. This way, if you are able to spend most of your time in solving all the easier questions, you will be able to score a good rank..