Overall, the test was nice and easy. I already know that I made a mistake in the non-calculator section (FML), but other than that, I'm expecting 90+ or a Band 6.
For the last question, my expression was this:
1³ + 2³ + 3³ + ... + (n-2) ³ + (n-1) ³ + n³
I realise that it doesn't work for...