It's a tough section but certainly conquerable. If you are like me and maths isn't your strongest aspect then it's just practice
I'm sure others will have advice but as its still fresh in my mind:
- learn the shortcuts for calculator, flagging and next question. You save valuable seconds each question doing this.
- eye ball big sets of data e.g. if it's asking you to find the biggest differences between a bunch of years,you could work it out but it's much easier to glance at the data.
- skip the hard questions! Grab the easy points first and then work backwards. There were a few question styles I struggled with so I just skipped them.
- keep an eye on the time. Every other question or so look up!
- make sure you know the area of a circle, averages and percentage Inc/dec equations off the back of your hand. A good third of my questions involved calculating a percentage change.
- keep clear notes of your calculations. Often a question at the end of a question set will involve an answer you calculated at the start. That's another 15-20 seconds saved.
- just remember that the maths they are asking you to do isn't complicated and you will know it! You just need to keep a level head. Actually I should mention that you get a minute between each section. I used it by sitting there with my eyes closed to rest them and to relax momentarily. it's free time so I think you should use it to prepare yourself mentally.
Everyone has their own strategy but find what works for you. I'm sure you will do just fine