Zetamac vs firm tests
Many trading applicants use Zetamac to make two-digit arithmetic automatic. Firm OAs add penalties, skip decisions, multiple-choice traps, and extra sections that Zetamac does not have. This page covers what transfers, what does not, and how to combine the two.
What Zetamac measures
Default Zetamac is a two-minute stream of addition, subtraction, multiplication, and division, answered by typing. There is no −1 or −2, no designed wrong options, and no sequences paper afterwards. Skipping is no different from being slow. The score is roughly the number of correct operations you completed. That is a useful skill, and one part of what firms test.
Forums sometimes treat a Zetamac score as a proxy for IMC or Optiver readiness. Better-sourced write-ups say IMC's trader OA is not an 80-in-8 (see IMC Trading OA), so a Zetamac score does not predict it.
Zetamac and firm formats compared
| Zetamac | 80-in-8 | Flow-style | CTC-style | |
|---|---|---|---|---|
| Clock | 2 min stream | 8 min / 80 | 8 min / 75 | 15 min / 50 |
| Penalty | None | −1 | −2 | None |
| Skip as strategy | No | Yes, often correct | Yes, usually correct | No, never leave blanks |
| Wrong options | None (typed) | None (typed) | Built from slips | Mixed families |
| Second skill | None | Sequences, probability, games in the full OA | Interview rounds after the numerical | Verbal / spatial / logic in the same paper |
Why scores do not convert
The numbers use different units. A default Zetamac result is a count of correct completions during the selected two-minute stream. TradeMind's 80-in-8 result uses correct − wrong; skips = 0; its Flow-style result uses correct − 2 × wrong; skips = 0; and its CTC-style result uses raw score = correct; wrong and skipped = 0. Even before question difficulty, those are different measurements.
- 80-in-8 example: 68 correct, 7 wrong, 5 skipped = 61 net.
- Flow-style example: 72 correct, 1 wrong, 2 skipped = 70 net.
- CTC-style example: 38 correct, 10 wrong, 2 skipped = 38 raw.
Compare each format only with your own previous attempts. Zetamac measures arithmetic fluency; a firm-style simulator measures pace, penalty discipline and format switching. A rising trend in either is useful. Their absolute scores are not interchangeable.
What transfers
- Two-digit × two-digit multiplication in one step.
- Trailing-zero bookkeeping on large products and quotients.
- Instant fraction, decimal and percent conversions in both directions.
- The stamina of answering continuously without looking at a phone.
If you still pause on 13 × 17 in Zetamac, strategy will not save you on a firm paper. Fix that first. Ten minutes of Zetamac at the start of a study block is a reasonable warm-up.
What does not transfer
1. Negative marking
On Zetamac a miss only costs you the point. Optiver-style 80-in-8 charges −1 and Flow charges −2, which changes the best policy. Candidates who only maximise throughput keep answering into negative EV on Flow. See Flow Traders passing score for the EV arithmetic.
2. Skipping
On Zetamac an unanswered question just lowers your count, so the habit is to attempt everything. That habit costs points at −1 and more at −2. Practise the skip key on a timer that scores net.
3. MCQ distractors
Flow and Maven include the answer produced by a common slip among the options. Typed Zetamac has no such trap. Maven's five-choice format makes blind-guess EV worse than Flow's. Practise those papers in MCQ form.
4. Non-arithmetic sections
Optiver's publicly described OA continues into NumberLogic sequences, Beat the Odds probability, and Zap-N games. CTC mixes spatial, verbal, and logic in the same 15 minutes. Jane Street often has no timed math OA. Zetamac practice covers none of these. Practise them with the sequences drill and the probability & EV drill.
A session plan that uses both
- 10 minutes Zetamac (or the daily mental-math drill on this site). Accuracy first, then speed.
- One full firm-format paper for the firm you are applying to: 80-in-8, Flow, Maven, Akuna, or CTC.
- Review every miss and sort it: knowledge gap, rushing, or "should have skipped". Zetamac cannot produce the third kind.
Each web simulator here has one fixed set; the app's free tier generates a new set every day. Use the web paper to learn the scoring, and switch to the app's daily sets when the questions start to look familiar.
Questions
Is Zetamac enough to pass Optiver or Flow Traders?
It shows you can do the operations. Firm papers test more: Zetamac has no skip-or-guess decision, no wrong-answer penalty, no firm-style distractors, and no second section (sequences, probability, mixed reasoning). Candidates with strong Zetamac scores still fail 80-in-8 on negative marking and Flow on −2 MCQ traps.
What Zetamac score should I aim for?
There is no official mapping from Zetamac to any firm's cutoff. Forum posts often treat a score in the 40s or 50s (default 2-minute settings) as 'comfortable arithmetic'. That is not a pass mark. Use Zetamac to bring your error rate down, then switch to a firm-format timer.
Should I stop using Zetamac?
No. Use it for the first 10 minutes of a session, for two-digit multiplication and clean division. Spend the rest of the session on a format with a penalty and a skip key.
Can I convert a Zetamac score into an Optiver or Flow score?
There is no defensible conversion factor. A Zetamac count measures completed correct operations during its chosen settings; an Optiver-style result is correct minus wrong across 80 questions, and this Flow-style result is correct minus two times wrong across 75. Different clocks, denominators, penalties and decision rules make a one-number conversion misleading.
TradeMind is an independent training tool and is not affiliated with Zetamac, Optiver, Flow Traders, Maven Securities, Chicago Trading Company, or any other firm or product mentioned. Zetamac is a separate arithmetic trainer. Firm format figures below are reconstructions from publicly available descriptions and may evolve.