How trading interviews test your maths, and how to train for it.

Short, specific guides written around the drills on this site. Each one ends with the practice that actually moves the number.

• Optiver mental maths test: format, scoring and how to practiseWhat the Optiver 80-in-8 arithmetic test asks, how negative marking changes your strategy, and a four-week drill plan using free timed practice.
• Mental maths for trading interviews: what to drill and howThe arithmetic, fractions, percentages and estimation that trading and quant interviews test, with the techniques that make each one fast.
• The market making game in trading interviewsHow the classic make-me-a-market interview exercise works, why you get picked off, and how to quote, size and settle like a trader.