How would you react if I told you that your interview, so far, was badly at this point? And How would you rate me as an interviewer?

And the answer was:

After a few moments of "what a bloody waste of time" and "I spent 30 getting here" I realized that she had said IF I told you. So I calmly said "then it wasn't meant to be and I will brush myself off and do better at my interview at Lehman Brothers tomorrow" (A little harsh looking back at it - but lesson learnt". The second question I responded along the lines of "Well....... this was the hardest interview I have in my short career so far. I hope I am successful so that I won't have to go through another one! Joking asides - I thought that questions were different to what I expected and made me think outside of the box, which doesn't happen much at interviews I don't think. Even this question is a good example of that.

Additional information

This was asked for a junior operations role at Goldman.

I didn't get the job. I think my response to the first question lost me it - either that or I just wasn't good enough. I have also been asked what's half of 99 and had 2 seconds to answer it - more difficult under pressure! Try it out on someone.