Isaac physics Senior Physics Challenge

I started not long ago and have done around 100 question which are c1 + but im seeing people having done like 800. Where are they all? I dont think i can even find 800 individual questions of that category or are they counting separate parts? Also if a question has an updated version will the old one still count towards? Thanks

I did this last year and here is what works: any C1, C2, C3 questions in maths or physics a lvl or further a or uni. So, there are like 800-900 questions total. HOWEVER, it is very unlikely you will need to do all of them and to have a decent shot at the residential, you should prob aim to do 600-700. I don't think old versions count, but I am not too sure about that.

How long did it take you to get to that 600-700 mark? And did you manage to get into the SPC summer school?
Thanks

I did get into the summer school. tbf I'm probably very anomalous (talking to others at the residential), but I personally did ~90% during the first 1.5 wks of christmas holidays (whilst procrastinating my EPQ )
Most people I talked to just regularly did questions throughout the year, probably a bit more in the month leading up to the deadline, which I would definitely recommend over my way. If you keep a consistent good pace, you should get enough questions, but just keep in mind that the harder questions tend to take exponentially longer.

What about the problems that involved y13 content? Did you search it up or learn the content?