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80 in 8 Mental Math Challenge
A free Optiver-style timed arithmetic simulator: 80 questions, 8 minutes, +1/−1 scoring. Built for trading firm online assessment prep.
Optiver-style 80-in-8 challenge
Trading firms often screen candidates with a timed arithmetic test: roughly 80 questions in 8 minutes. This free simulator mirrors that pace — mixed addition, subtraction, multiplication, division, and light percentages.
- 8:00 countdown starts when you begin
- +1 for each correct answer
- −1 for each incorrect answer (skip is neutral)
- Skip freely — unfinished questions score 0
Anecdotally, competitive scores sit around net +50 to +60. This tool is for practice only and is not affiliated with Optiver or any firm.