Oxbridge maths interviews

I was wondering how on earth you can judge how you will perform in oxbridge maths interviews. If you sit a MAT or TMUA paper you can mark it and clearly see your result. But for interviews, I have no idea how many questions you are supposed to answer, what percentage of them you should be getting right, and how they are marked in general.

If there is some way to gauge interview performance can someone please let me know.

as my estimated interview performance will likely affect whether I apply for oxford or Cambridge maths. (I would ideally love to apply for Cambridge but I find relying on interviews alone for an offer risky, while for oxford I am confident I can get a pretty decent MAT score to somewhat cushion potential underperformance in the interview)

Generally candidates have been shown to not be very good at judging their own performances. You also won't get any useful information based on how many questions you've answered. They like to see how you respond to new information. For candidates with very different backgrounds, this may be at a very different point. They may also change question if the question happens to be shorter or if the topic is less familiar to you (this isn't something that would be penalised if it just happens that your school teaches it in a different order).

May I ask how people even prepare for interview questions? I am pretty certain that there is no "past papers but for interview" stuff for people to get a glimpse of what they might encounter.

https://www.drfrost.org/downloadables.php?noid=917 — the TBO problem solving booklet is a good start. Practice talking through your answers and explaining your thoughts. I'd also recommend looking up on YouTube some examples of Cambridge mock interviews to see how they work in practice.

That helps a lot...thank you!

If you're applying to Oxford, try this link https://www.uniadmissions.co.uk/the-big-book-of-oxbridge-applications/ it is a great resource as it offers advice, practical strategies and a step-by-step guidance through every stage of the process. Good Luck with applying!