NSN
Yeah I did the exam last year and I currently go to Nossal. There's probably a very low chance of getting into Macrob with 1 superior and some averages. Macrob is like the hardest selective school to get into, you'd need like 2 or 3 superiors with no averages to get in. It also depends on your current school and how many people are applying from your school. I can't really speak for Suzanne Cory since I was never really interested in the school so I never researched anything but its definitely easier to get into than Macrob. 1 superior might get you but its still unlikely, especially if you have some averages. I'd say try to aim for 2 superiors with no averages, and you'll most likely get in.
In terms of maths formulas, if you've learnt everything in your Year 9 maths textbook, you'll probably be fine. The test wasn't too hard personally, it really just matters on how fast you are. Most people would've studied the same content for the maths test so what really matters is how fast and accurately you can answer the questions.
