What interview was that? For university? If so, I know what you mean, there is something about the situation that means even if you aren't panicking it is impossible to think. It does help if the interviewers are nice, I don't do maths, but there was maths in my economics inteview and it was so horrible I answered the question and didn't realise until they told me, because I had forgotten what the question was!

I suppose doing hwk in a train is more interesting than doing it at home, at least you have changing scenery. I'll be going to London on Tuesday for Westminster day. Now politics I like, there is no wrong answer there.