Assume , you are preparing for the world's toughest Examination, where a lot of Hard work is required to crack the Exam.
How many hours of sleep would be enough to maximize your study hours but also maintaining good mental and physical health?
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Usually sleeping 8 hours are good for health, but at least 6 hours are compulsory, otherwise you will feel tired after few days and may effect your studies. so sleep at least 6 hours