3x 30 min interviews, over 2 days
Problem solving
Past papers, practice interviews if possible, A-level and calculus revision
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Rest well; stay hydrated.
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
Interview spread: 1 in morning, 1 in afternoon, 1 next day
Length of interviews: about 30 minutes each
They didn’t ask about personal statement beyond an initial icebreaker of like “oh this is interesting”.
We’re very friendly, a Trinity
I did all the past papers I could find on the website, and tried to do the later ones timed and closed book. I also found British Mathematical Olympiad style questions useful for practice - and looking throughly over the material needed for C1/C2 (I don't know what the equivalent is now but I’m sure it’s on the website.)
I would recommend getting as many
If you can, ask
If you’ve written about anything on your personal statement, I’d recommend looking over that just in case, but don’t spend too much time on this.
Knowing derivatives and integrals will save some time having to derive them.
Practise drawing different graphs: this often comes up, so have a routine - e.g. think about turning points / points crossing x and y axis / asymptotes / where it goes to as x tends to negative or positive infinity, etc.
The most important thing is to sleep and rest well, stay hydrated, etc., so you can do your best for interview.