3x 30 min interviews, each a day apart
Both interviews: series of maths problems - graph sketching, equation solving, some proof
Past papers, 'Dr Frost Maths'
-
Past papers are the best resource; preparation is useful.
Remember this advice isn't official. There is no guarantee it will reflect your experience because university applications can change between years. Check the official Cambridge and Oxford websites for more accurate information on this year's application format and the required tests.
Also, someone else's experience may not reflect your own. Most interviews are more like conversations than tests and like, any conversation, they are quite interactive.
Test taken:
Number of interviews: 3
Skype interview: No
Time between each interview: 1 day
Length of interviews: 30 minutes each
The questions were mostly about graph sketching and equation solving. There were some small bits of proof too.
The personal statement was not talked about much (but still make sure you've done everything you've said you've done in the statement).
Each interview was just a series of maths problems.
The atmosphere was quite relaxed. But
I did all the past papers. I also used 'Dr Frost Maths'.
The past
Preparation was essential because all the practice made me quite a bit better at maths and so I was more likely to do well in the interview.
If I was to do it again, I would have spent more time hammering out some of my weak areas, so that if they came up I would do better. I might have read a few more books about the subject too, but probably not.