Six seconds a question. Minus one for every wrong answer.
Trading firms don’t really test arithmetic. They test how fast you decide, and whether you know when to skip. Quantm generates unlimited timed drills with the negative marking, missing operands and sequences that general-purpose math trainers leave out.
What a free arithmetic trainer can’t teach you
They’re good, they’re free, and thousands of candidates use them. They also model none of the things that actually decide your score.
- Negative marking
- A wrong answer costs a mark. Below about 50% accuracy, guessing has negative expectancy — so part of what's being tested is restraint, and you cannot practise restraint on a drill that never punishes you.
- Missing operands
- 66 × ? = 138.6. It's a division wearing a multiplication sign, and it's the shape candidates report freezing on, because the forward direction is all anyone drills.
- Forced sequential answering
- Some formats serve one question at a time with no way to skip or come back. That trains a completely different decision from a paper you can triage, and it needs its own practice.
- Colon division
- At least one firm writes division as 5:2. Trivial once you've seen it; two lost seconds a question if you haven't.
- Sequences and estimation
- Separate sections in most assessments, and pure arithmetic practice does nothing for either.
Every question knows how it should have been solved
Because each problem is constructed rather than pulled from a fixed bank, the engine can inspect the numbers it just made and name the shortcut a fast mental calculator would use on them. Miss a question and you get the technique, not a red cross.
Difference of squares when the operands straddle a round number. ×25 as ÷4 then ×100. Which common denominator is the small one. It is the part of a tutor that scales.
? − 112 = 69
= 181
The missing value is the larger one: 69 + 112 = 181.
Built to the format you’re sitting
Each simulation matches the question count, clock, scoring and answer format that candidates report for that assessment — including whether you are allowed to skip.
- Optiver · 80 in 880 questions, 8 minutes, minus one for every wrong answer.80 q · 8 min
- Optiver · NumberLogicSequences, escalating difficulty, no going back.15 q · 25 min
- Flow Traders · Mental math60 in 6, served one at a time. You cannot skip.60 q · 6 min
- Flow Traders · Sequences25 sequences, 25 minutes, skipping allowed.25 q · 25 min
- Akuna Capital · Mental math80 in 8, typed answers, no fractions.80 q · 8 min
- IMC · Numerical reasoningFewer questions, more time, mixed arithmetic and patterns.24 q · 18 min
- SIG · Quantitative roundNine questions, an hour. This one is not a speed test.9 q · 60 min
Quantm is independent and is not affiliated with or endorsed by any firm named here. Formats are reconstructed from publicly shared candidate accounts and may change without notice.
Priced for a deadline, not a habit
Nobody wants a mental math subscription for life. You want to be sharp on a Thursday in October. So the main plan is a 14-day pass — long enough to fix a weak spot before an assessment, and it ends by itself.
The arithmetic drills stay free permanently. Paying adds the 11 advanced categories, every firm simulation, the method for each question you miss, and your progress over time.
See the plans