Flow Traders math test practice: 60 questions in 6 minutes

The Flow Traders numerical screen is not a typing test. Four options, one clock, +1 for a hit and -1 for a miss, at roughly six seconds per question. That format changes how you should answer: most of the time you are not meant to finish the calculation, you are meant to find the single option that survives a quick check. This desk generates that test and names the shortcut after every question. Free, in your browser.

What the screen looks like

Reports of the Flow Traders assessment describe a rapid-fire numerical section, usually 60 questions in 6 minutes or 80 in 8, drawn from a narrow set of shapes: two-digit products, decimal arithmetic, fraction addition and subtraction, percentages, and equations with a missing operand such as 49 × ? = 343. Nothing is conceptually hard. The pressure comes entirely from the clock, and the scoring means a blind guess is a losing trade: one in four odds on a bet that pays +1 and costs -1.

The point everyone misses: you can skip the calculation

Because the answer is on screen, you rarely need it to the last digit. You need to eliminate three options. These are the checks that do it, and the ones this desk drills by name:

• Last digit: 47 × 43 must end in 1, because 7 × 3 = 21. Any option that does not is gone before you multiply.
• Order of magnitude: 0.6 × 70 × 5,000 is 6 × 7 × 5 = 210 with the zeros put back. Counting zeros is faster than multiplying.
• Count the decimals: one decimal times one decimal gives two. 0.55 − 0.026 must run to three decimals.
• Odd or even: two odd numbers multiply to an odd number, so half the board can disappear at a glance.
• The denominator: 9/14 − 3/7 stays over 14. Any option on another denominator is not a candidate.
• Bracket it: dividing by a fraction under 1 makes the number bigger, so 15 ÷ 5/6 has to exceed 15. And if 52 ÷ ? = 65 grew, the divisor is under 1.
• Round and estimate: 28.5 × 24.7 sits just under 28.5 × 25 = 712.5. That is enough when the options are far apart.

Try these the fast way

Two of the five Mental Math modes

Both live on the Mental Math desk, next to the untimed drills and the typed Optiver-style 80-in-8.

• Sprint 60-in-6: the real thing. One clock for the whole run, +1 / -1, and no feedback at all until it is over, because the screen does not give you any either. The debrief then lists every question, your pick, the right answer and the shortcut that would have saved you the arithmetic.
• Shortcut trainer: no global clock, pick the question families you want (fractions only, percentages only, missing operands only), and every answer immediately shows the trick. This is where the six seconds per question actually come from.

Both modes track your accuracy two ways: by question type, and by shortcut. Seeing "Bracket it: 2/9" tells you something a raw score never will.

The rest of the Flow Traders funnel

The numerical screen is the first gate, not the last. Flow Traders also runs a separate sequences test, technical rounds with brainteasers and quick market scenarios, and a case study on ETF pricing and hedging. The Flow Traders interview prep page maps the whole funnel onto a training plan.

Explore the rest of the desk

Based on public interview reports and candidate accounts; formats change, so verify the current process with your recruiter. My Quant Journey is independent: not affiliated with, sponsored by or endorsed by Flow Traders.