Timed OA mock · OptiverMembers
Optiver 80 in 8 & online assessment practice
3 sections · 126 questions · 63 min total
Optiver's assessment leads with a blistering mental-math round, then layers in number-sequence logic and a probability round, all under hard per-part clocks.
Style mock based on candidate reports — not official questions; formats change. Compiled from candidate reports on aptitude-test-prep.com, quantvault.org, quantbrainteasers.com (2026).
Candidates commonly report ~55 net on 80-in-8 as a pass and 70+ as competitive (hearsay).
The timed mock and its single sections come with a LeetQuant membership. The format and sample questions below are free, and so are the 2-minute drills.
Format
| Section | Questions | Time | Scoring | Tools |
|---|---|---|---|---|
| Mental math (80 in 8) | 80 | 8 min | +1 right · −1 wrong | Pen and paper allowed, no calculator |
| NumberLogic | 26 | 25 min | +1 right · −1 wrong · 0 skipped | Pen and paper allowed, no calculator |
| Beat the Odds | 20 · 90s each | 30 min | +1 right · −1 wrong · 0 skipped | No calculator |
Try a few sample questions
Generated from a fixed seed in the same style and difficulty range as the real section — not the exact questions you’ll see in a timed attempt.
Mental math (80 in 8) · 8 × ? = 3,096
Answer: 387
Mental math (80 in 8) · 20.8 + ? = 109.8
Answer: 89
NumberLogic · 2, 2, 4, 6, 10, 16, ?
Answer: 26
About the probability round
The probability section draws from LeetQuant’s own problem bank rather than a generator, so we don’t publish sample answers for it here. Preview the style in the probability interview guide or browse the probability category directly.
Frequently asked
What's in the Optiver-style mock?
3 sections: Mental math (80 in 8) (80 questions, 8 min); NumberLogic (26 questions, 25 min); Beat the Odds (20 questions, 30 min). That's 126 questions in 63 min total.
How is the Optiver mock scored?
Mental math (80 in 8) is +1 right · −1 wrong; NumberLogic is +1 right · −1 wrong · 0 skipped; Beat the Odds is +1 right · −1 wrong · 0 skipped. Nothing is marked right or wrong while you're taking it — you see your score and a breakdown only after you finish.
Is this the official Optiver assessment?
No. Style mock based on candidate reports — not official questions; formats change. Compiled from candidate reports on aptitude-test-prep.com, quantvault.org, quantbrainteasers.com (2026).
Related
Ready for the real thing?
The full, timed Optiver mock, with a scored breakdown at the end, comes with a LeetQuant membership.
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