How do I practice for a trading firm's mental math test?

Drill no-calculator arithmetic under a timer until it's automatic — short, frequent sessions beat occasional long ones. NeetQuant's Mental Math Blitz mirrors the format of tests like Optiver's 80-in-8 so the real thing feels familiar.

What is Optiver's 80 in 8?

It's Optiver's well-known numerical assessment — widely reported as 80 mental-arithmetic questions in 8 minutes. Clearing it requires fast, accurate calculation across integers, fractions, and decimals, which is exactly what timed mental-math practice builds.

Is the Mental Math Blitz free?

Yes. The Mental Math Blitz is free to play with a NeetQuant account; Premium adds configurable question counts and timers plus leaderboards.

Assessment simulatorFree to play

Mental Math Practice for Trading Interviews

No-calculator arithmetic against the clock — the classic trading-firm speed test.

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Trading firms open their process with a raw speed test: fast, no-calculator arithmetic across integers, fractions, decimals, and percentages. Optiver's '80 in 8', Flow Traders' numerical test, and IMC's number rounds all probe the same thing — can you compute accurately when the clock is running and the pressure is on.

The Mental Math Blitz recreates that format. Questions come one after another, correct answers auto-advance so a good run flows, and your score reflects how many you clear inside the time limit. The goal is to make arithmetic automatic, so that in a real interview your working memory is free for the actual problem.

What it's modelled on

Optiver's ‘80 in 8’ and other firms' timed mental-arithmetic tests

This mirrors the first-round numerical filter at speed-focused firms — most famously Optiver's widely-reported '80 in 8' (around 80 arithmetic questions in 8 minutes), and the fast mental-math tests reported at Flow Traders and IMC. Like the real assessments, it's no-calculator and correct answers auto-advance under a hard time limit.

What it trains

Addition, subtraction, multiplication, and division without a calculator
Fractions, decimals, and percentages under time pressure
The speed-and-accuracy balance firms filter on in the first round

How it's scored

Each correct answer auto-advances to the next question; you're scored on how many you get right within the timer. Premium unlocks configurable question counts and timers so you can push the difficulty as you improve.

Frequently asked questions

How do I practice for a trading firm's mental math test?: Drill no-calculator arithmetic under a timer until it's automatic — short, frequent sessions beat occasional long ones. NeetQuant's Mental Math Blitz mirrors the format of tests like Optiver's 80-in-8 so the real thing feels familiar.
What is Optiver's 80 in 8?: It's Optiver's well-known numerical assessment — widely reported as 80 mental-arithmetic questions in 8 minutes. Clearing it requires fast, accurate calculation across integers, fractions, and decimals, which is exactly what timed mental-math practice builds.
Is the Mental Math Blitz free?: Yes. The Mental Math Blitz is free to play with a NeetQuant account; Premium adds configurable question counts and timers plus leaderboards.