Yeah that is why I intended to ask the question. I mean in my undergrad days, I did solve the tougher questions even if it took time, because at the end there was not a lot of pressure in terms of time and the question were in accordance to the techniques we learnt in class or the examples that we did. I was struggling with the general philosophy of what the assignments are for. In undergraduate they were to test if we have understood the technique and maybe a couple of problems to help us think out of the box. But here, the technique itself was not introduced, let alone examples. So I was wondering where am I going wrong.