As a top global quant trading firm. Optiver It includes 80 speed calculations in 8 minutes ("80-in-8"), 10 probability questions (90s each), 26 sequence puzzles in 25 minutes, 9 reaction games in "Zap-N", and untimed BQ & BQ. It includes 80 speed calculations in 8 minutes ("80-in-8"), 10 probability questions (90s each), 26 sequence puzzles in 25 minutes, 9 reaction games in "Zap-N", and untimed BQ & personality tests in "Zap-Q". personality tests in "Zap-Q". Let's explore each part to help you ace it.

1. 80-in-8: Speed Mental Math
This section tests your ability to perform rapid mental calculations under pressure. You'll face 80 arithmetic problems- addition, subtraction, multiplication, and division-all to be solved within just 8 minutes. You'll face 80 arithmetic problems- addition, subtraction, multiplication, and division-all to be solved within just 8 minutes. Accuracy matters, but so does speed, so it 's crucial to strike a balance.
2. Probability Questions (90 seconds each)
You'll be presented with 10 logic-based or combinatorial probability problems, each timed at 90 seconds. These questions often involve These questions often involve dice, cards, coins, or abstract logic puzzles-designed to test your reasoning under time constraints.
Consider a standard deck of 52 playing cards (no jokers). What is the probability of randomly drawing two cards in a row, with both being aces?
Solution.
- Probability of first card being an ace. 4/52 = 1/13
- Probability of second card being an ace (after one ace is drawn). 3/51 = 1/17
- Combined. (1/13) × (1/17) = 1/221
3. Sequence Puzzles (26 in 25 minutes)
This section includes number, letter, or pattern-based sequences that require logical deduction. You'll need to spot the rule behind the pattern and select the correct next item. You'll need to spot the rule behind the pattern and select the correct next item.
4. Zap-N: Reaction & Cognitive Speed Games
Zap-N tests your reaction time, pattern recognition, and short-term memory through a series of gamified tasks. It's fast-paced and requires you to stay focused even as the patterns change rapidly. requires you to stay focused even as the patterns change rapidly.
5. Zap-Q: Behavioral and Personality Questionnaire
This untimed section assesses your personality traits, work style, and alignment with Optiver's culture. It includes behavioral It includes behavioral judgment questions and self-assessment scales.
Final Thoughts
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