At least a hundred hours of disciplined study are required to get a perfect SAT score for admission to MIT. Focus on your strengths and work towards minimizing your flaws. Review your mock tests regularly and continuously work towards a better score. The more you practice,the more you’ll be able to plug the gaps in your preparation. Time your mock tests so that there are no last-minute hurdles for you to counter on the test day. Since admissions to colleges are holistic in nature, along with a focused and disciplined approach to get a perfect SAT score, you must also work towards the other domains that decide your admission criteria.