I would like to ask if looking at questions prior to Dec 2010 would be recommended?
I noticed that some students are looking at these, I managed to google few of these past papers but they seem to be different to the current papers, seems like there was way more calculations in the past than now?
There were more calculations then. In particular the old Q1 and to some extent Q2 were calculation heavy compared to now. The shorter questions from those papers can still be of use.