What Is a Good Mental Math Score?

The short answer

On a 60-second mental math drill covering the four basic operations, most casual users land between 25 and 45 correct answers. Serious practice pushes that into the 50s, and the quant-interview target most trading firms look for is roughly 65+, similar to a strong Zetamac score. On the 10-second sprint, a good score is 7 or more; anything at 10+ is elite.

Benchmark tiers

The tiers below assume you've selected a balanced mix of addition, subtraction, multiplication, and division at medium difficulty. Narrower operation sets will inflate your score.

• Beginner: You're building fluency with single-digit facts. Focus on accuracy, not speed.
• Intermediate: Comfortable with basic operations. Start pushing pace on multiplication and subtraction.
• Advanced: Fast recall and consistent accuracy. Typical target for competitive-exam prep.
• Quant-interview level: Sub-second recall on most problems. Comparable to strong Zetamac scores used in trading-firm interviews.

Accuracy vs. speed

Timed drills only count correct answers, so a wrong answer costs you twice — the time you spent and the point you didn't earn. In practice:

• Below ~85% accuracy, slowing down almost always raises your score. You're guessing on problems you'd get right with another half-second.
• Between 85–95% accuracy, you're in the healthy zone. Push pace and let a few mistakes through.
• Above ~95% accuracy at a high score, you're leaving speed on the table. Force yourself to answer before you've fully verified.

What "quant-interview level" really means

Trading firms like Jane Street, Optiver, and IMC use timed mental math as a screening filter. The most-cited benchmark is Zetamac's default two-minute test, where strong candidates land around 65–80. Our 60-second drill uses a similar operation mix, so double your drill score for a rough Zetamac comparison: 33 here ≈ 66 on Zetamac.

If you're prepping for a quant interview, aim for consistency, not a single lucky run. Firms care that you can hit the target three times in a row on cold starts — not that you peaked once after a warm-up.

How to improve your score

1. Drill your weakest operation in isolation for a week (usually division or 2-digit multiplication).
2. Memorize the 2–19 times tables cold. Every hesitation on a known fact costs you a full second.
3. Practice at a difficulty one step above what feels comfortable — you adapt to the harder range.
4. Do short daily sprints instead of long once-a-week sessions. Recall speed decays fast.