Optiver Intervals Test
15 questions · 60 seconds per question · Numerical bounds
Fixed practice- 15 questions
- 60s per question
- 2 bounds
Preparing your results
About Optiver Intervals
The Optiver Intervals Test is an online assessment that challenges candidates to estimate numerical answers by providing a lower and upper bound. Rather than entering a single answer, you must choose an interval that you believe contains the correct value. Narrower intervals earn more points when they contain the correct answer, while intervals that miss the target receive no points.
Our practice simulation contains 15 questions, each with a separate 60 second timer. Questions cover probability, expected value, visual estimation and quantitative reasoning. The challenge is balancing accuracy with precision under time pressure.
What questions can you expect?
Identify the quantity and unit before choosing your bounds.
| Question type | Skills practised |
|---|---|
| Probability | Finite events, repeated trials and unequal dice |
| Expected values | Waiting times and weighted payouts |
| Visual estimates | Counts and proportions of colored marks |
| Statistics and scale | Nearest-rank percentiles and synthetic numerical estimates |
Original practice content, not guaranteed employer questions.
Understanding your practice score
Your interval must contain the exact target to earn points. Narrower covering intervals earn more. Results show mean score out of 100, coverage across all 15 questions, and worked solutions for each question. Missed, skipped and unanswered questions receive zero points. There is no published employer pass cutoff in this simulator.
Frequently asked questions
What does this Intervals practice test contain?
The full test contains 15 original questions, each with its own 60 second clock. You estimate probabilities, expected values, visual quantities, percentiles and synthetic totals using a lower and upper bound.
How are the bounds scored?
A range must contain the exact target to earn points. Narrower covering ranges earn more. Misses and unanswered questions earn zero. Results show average score out of 100, coverage and interval width separately.
Can I practise for free?
Yes. Take the complete fixed practice test and review all worked solutions without an account. Sign up to save your results. Premium provides fresh randomised tests with the same format.