The first stage is composed of two online assessments on Zyvo. The first one is 80in8, a set of 80 multiple choice mental maths questions to be answered in 8 minutes. It's decently hard, and Zyvo doesn't offer a practice suite (you do have 2 practice questions to get used to the format though). Small note on 80in8, it may not be your run-of-the-mill maths test. Questions usually involve fractions and floating point numbers, you have 4 options, and no time limit for each question (how to pace yourself is up to you, just note that you can't skip and wrong answers detract points). I haven't found a good practice website with fractions, but for floating point numbers I recommend tradermaths.com. Don't really know why they need Quant Researchers to be good at mental maths, I assumed that was the Traders' area of expertise (and the testing website evidently does too, since it kept erroneously referring to my application as "Trader application"). Answered 57/80 questions, probably got around 5 wrong trying to answer quickly, so I estimate a score of 47, but Zyvo doesn't offer detailed reports so can't know for sure. Didn't pass to the second assessment.