<p>I recently bought the RR book and read the whole math section. One strategy that he often repeats is that you need immediatly see which problems will take up time andor be difficult. My question is how do you recognize that the problem is hard or will be time consuming with out first trying to solve the problem?</p>
<p>Looking at the problem and processing if this is a type of question you can answer and if you can’t, just skip it</p>