I found that the best way to go about it is to look at the question first and pick out certain keywords. Then look at the big paragraph, skimming through until you find the keywords and then you should be able to select the right answer. If it is taking too much time, it is best to flag the question and move on because some paragraphs are harder than others and you may have time at the end. It is always best not to spend more than 1 minute on each question since there are 44 to do within 21minutes and with an exam like the UKCAT, it is better to cover all the questions than get stuck figurin out one tricky question.