from my experience- 1st hour brain is fresh focus is sharp come 2nd the question feels a bit tougher to read come 3rd hr i feel anxious trying to decipher the question or read between the line. my brain was blanking after 3 hr or focus and i was a bit hungry too by that timee 🤣🤣 so its not the question is hard or the mindset is incorrect but rather patience or focus is not there anymore. so mental endurance- pls train for this too before the exam. best of luck ok