A-level Maths Proof

Hi,

Does anyone know of a document/website online that summarises all the information we need to know for proof (especially Edexcel). E.g. how to represent prime numbers, what consecutive integers represent, etc. because I keep losing marks on proof and I don't know how to get better. I am practicing, but is this the best way to get better? Thanks.

Can you be clearer what you mean?

https://mmerevise.co.uk/a-level-maths-revision/edexcel/
is this any good?

This is helpful thank you. Is practicing these the only way of improving? I feel like they expect a lot of us just on the spot in the exam.

Yes - can you give an example of a question you struggled with?

consecutive numbers n, n+1, n+2

general even number 2n

general odd number 2n+ 1 or 2n - 1

Sure, please see attached. I know this is from Madas, but there have been past paper questions that have required this same working. I don't understand how I am meant to know to represent all numbers as either a multiple of 3, 1 more than, or one less than. I just represented them as 2m or 2m+1 but didn't get anywhere.