Optiver

Speed and accuracy in mental math and probability

Very High time pressure ~22 days to hire

Optiver is famous for its extreme emphasis on mental math speed. The "80 in 8" test (80 arithmetic questions in 8 minutes) is the first hurdle. Beyond that, expect probability theory, market intuition, and trading game scenarios.

Interview Rounds

Round 1:80 in 8 Test

8 min

80 mental math questions in 8 minutes. Addition, subtraction, multiplication, division. Wrong answers cost 2 points, correct earn 1. Target: 55+, competitive: 70+.

Round 2:Numerical Reasoning

30 min

Sequence identification and pattern recognition (NumberLogic test).

Round 3:HR Interview

30 min

Cultural fit, motivation, and behavioral questions.

Round 4:Technical Interview

60 min

Probability theory, expected value, Bayes theorem, market dynamics, and risk management.

Focus Areas

Mental arithmetic (speed-critical)Probability & Bayes theoremMarket intuitionRisk managementSequence recognition

Preparation Tips & Learning Paths

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