Difficult LR questions are, well, difficult.
Particularly with Necessary Assumption questions, I'm consistently able to do well on the easier ones (such as those that appear in the first 15-16 questions), but I am often thrown off by attractive answer choices on the difficult questions, particular questions that seem to appear in question numbers 17-21.
It occurred to me that I should probably be recognizing the question as a difficult question, but I'm not sure whether I should approach the question differently than I would approach an easier question?
In some of the explanations for the more difficult necessary assumption questions, it looks like there are some recommendations to apply the assumption negation technique to each answer choice. Is this the way I should be approaching questions when I recognize that they are difficult?
Should I be drilling with a focus on the more difficult questions? How can I get a list of those difficult questions?