SO basically just want to e4 extension 2 math. SHould I just focus on getting 1-15 mostly right and jagging some marks on 16. Like this may sound bad, but I don't know if its worth putting alot of my effort on the hard 16 questions when reallly you can e4 getting them all wrong
More or less yes.
1. For your Q11-15 (or maybe even Q11-12) you may want to:
- mark yourself strictly according to the marking criteria since you get marked on the entire solution not an answer
- besides getting the solution correct learn the more efficient method of solving the same problem
Those are kind of the lower hanging fruits you can aim for in the meanwhile.
2. The other thing is that the whilst usually the latter parts are more difficult than earlier parts : It is not always the case that any part of Q16 is much more difficult than say some parts of Q15 or even Q14. And that would be dependent on how confident or familiar each person finds each topic as well.
Hence you may want to judge case by case(say by topic and type of questions) and again pick the lower hanging fruits.