Frequently asked questions

What is Zetapro?

Zetapro is a free mental math trainer. It has a Zetamac-style speed game called Classic, drills built from your own slow and missed problems, 80 in 8 (80 multiple-choice questions in 8 minutes), and a set of probability and quant reasoning games. It runs in any modern browser, installs on a phone as an app, and has a Windows version.

Is Zetapro free?

Yes. Zetapro has no ads, no paid tier and no analytics. Signing in is optional, and everything works without an account.

How is Zetapro different from Zetamac?

Zetapro's Classic mode keeps Zetamac's rules and default settings: addition of numbers from 2 to 100, multiplication of 2–12 by 2–100, subtraction and division as their reverses, and 120 seconds. What Zetapro adds is everything around the round: it times every answer, sorts it by problem type, shows which types slow you down, turns them into drills, and brings missed problems back on a schedule. More on Zetapro as a Zetamac alternative.

What is a good Zetamac score?

There is no official benchmark: Zetamac doesn't publish one, and trading firms don't publish cut-offs. Your score is the number of correct answers, so on the default 120-second game a score of 60 means one correct answer every 2 seconds, including reading and typing, and a score of 80 means one every 1.5 seconds.

Compare scores only on the same settings, because changing the operations, number ranges or duration changes what a score means. Your recent average says more than your single best. In Zetapro you can set a goal score and see how often you hit it, and each operation gets a skill level: level 6 is fast enough for a Classic score of 60–69.

How do I practice mental math for trading interviews?

1. Play a few timed rounds on default settings to get a baseline.
2. Find the problem types that cost you the most time, such as carries, the 7 and 8 times tables or two-digit products, and drill those.
3. Practice decimals, fractions and missing-number questions, not just whole numbers.
4. Practice probability and expected value alongside arithmetic.
5. Track your average over time rather than your best round.

Zetapro does each of these steps: Classic for the baseline, stats and drills for weak spots, 80 in 8 for decimals and fractions, and probability games for the rest.

Does Zetapro help with trading-firm online assessments?

Zetapro is useful prep for trading-firm online assessments. It practices mental arithmetic under time pressure, probability and expected value, number sequences, ranking likelihoods, estimation ranges and spotting arbitrage in order books. Zetapro is independent and not affiliated with any of these firms, and its games practice the skills rather than copy any firm's test. See the probability and quant reasoning games.

What is 80 in 8?

80 in 8 is a round of 80 multiple-choice mental math questions in 8 minutes, covering whole numbers, decimals, fractions and missing numbers with all four operations. It uses net scoring: a point for each right answer, minus a penalty for each wrong one. Zetapro tracks your speed and accuracy for each question type.

Does Zetapro work on a phone, and offline?

Yes. Open the app in your phone's browser and add it to your home screen: on iPhone, Safari, then Share, then Add to Home Screen; on Android, Chrome, then the menu, then Install app. It opens full screen, has a built-in number pad, and works offline once installed. On a Mac, use the browser version.

Do I need an account, and where are my games stored?

No account is needed. Games are saved on your device. If you sign in with Google, they also sync to your own private account, so your phone and computer stay in step. You can export everything to a backup file at any time.

Is Zetapro affiliated with Zetamac or any trading firm?

No. Zetapro is an independent practice project, not affiliated with or endorsed by Zetamac or any trading firm. "Zetamac-style" means its Classic mode follows the same rules and default settings.