As far as I could tell the tests were specific to factset, certainly the finance and excel ones were. I didn’t recognise any of the hallmarks of the usual SHL/Mendas etc.type stuff. Which was refreshing. You get 90 minutes to do all three tests. More than enough time so don’t panic.
Excel test - easy, basic formatting and creating charts from data. Makes you use a few simple formulae like MAX() and SUM(). Only thing you might not know how to use that they ask is the VLOOKUP formula. Google it. It’s easy really though.
Numeracy - Multiple choice, basic questions and a few brain teasers involving things like speed calculations. Know how to calculate percentages and ratios quickly and you’ll be fine. They give you a basic calculator for this by the way. Some of the questions are really bizarre in how easy they are, for example I think one of them was literally ‘what is 3/8 of 72’ which is easy even without a calculator.
Finance - Again multiple choice. Only really a challenge if you aren’t from a finance background. It’s a mix of interpretation from given data, basic finance knowledge (e.g. what PER and EPS are) and some knowledge of the financial markets (e.g. if company xyz is the biggest company on zzz exchange what region of the world are they from).
I passed the tests, but screwed up the interview so if I were you I’d focus on preparation for that. The tests are all stupidly easy. I had them done and checked over twice within an hour.