Just try your best to answer as many as you can. If you are not sure, pick the one you think most accurate first and move on to the next question.
If there is time left, go back to that question and do your analysis again and change the answer if you think necessary. 
I had to answer 16 questions in 18mins...and that's how I did mine. (don know how many questions I got it right, LOL)

Don worry, just try to do your best. If not mistaken, there are people who did not finish answering and still made it to initial interview 

Yup, I got my result for the f2f interview already    The interviewer said normally it takes 10 working days.
I got mine at the 8th day if not mistaken.

You went for the f2f interview already? How was it?