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Optiver 80 in 8

Free Optiver 80 in 8 Practice Test (Realistic +1/−1 Simulator)

Practice 80 mental math questions in eight minutes with realistic penalties, decimal traps, fractions, and missing operands.

80 questions · 480 seconds · +1 correct · −1 wrong

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No account. No card. Your first run starts here.

Speed math arena
1 / 80Score 0

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Think fast. Answer cleanly.

Use the keyboard for every action. Your response time is measured with performance.now().

Enter to start · Esc to restart

Traintheoperationthatcostsyoupointsbeforetheclockexposesitagain.

Preparation guide

Optiver 80 in 8 format and preparation

Practice in one uninterrupted block and use the same keyboard controls you will use on test day. Speed improves when answer entry becomes automatic.

Review both accuracy and response time. A slow correct answer can still reveal the operation family that will cap your score under a fixed deadline.

Repeat weak families separately, then return to a full mixed benchmark. This keeps technique work distinct from pacing practice.

Answers before signup

Frequently asked questions

What does this Optiver 80 in 8 practice cover?

It models 80 four choice arithmetic questions in 480 seconds, including integers, decimals, fractions, and missing operands.

How is this simulator scored?

Correct answers score +1. Wrong answers and mid test skips score −1. Unreached questions score zero.

What score should I target?

A score near 55 is a commonly discussed preparation benchmark, not an official or guaranteed hiring cutoff.

Can I practice without an account?

Yes. The embedded trainer starts immediately and stores completed guest runs in this browser.

How should I review mistakes?

Separate calculation errors from slow correct answers, then drill the slowest domain and question shape before repeating a full benchmark.

Does the trainer work from the keyboard?

Yes. Multiple choice drills support number keys and A, S, D, F. Typed drills accept exact decimals and fractions.

Run the full benchmark.

Keep question-level timing locally and expose the family slowing you down.

Open full screen arena