Pythagoras, theta, particles, etc.. =P
Well we'll see how people go. I'm curious to see how those who found it easy end up going- There's that other dude who said he's only expecting 75% or something like that...
All I can say to those who aren't sure if it was easy or difficult- people in selective high schools found it considerably more challenging than usual (based on what I've heard), so if you're finding it hard, you aren't alone; and if you find it easy- either you're generally good & adaptive at maths, you're bullshitting, or you aren't really aiming that high.