The prompt
Estimate the number of passenger flights leaving a major international airport (e.g., LAX, LHR) per year. Walk through your structure and identify the biggest source of error.
Concepts this question tests
How to practice it in PrepOS
PrepOS's adaptive queue surfaces this question when you calibrate to a matching target level and your weakest concepts overlap with what it tests. Open the practice simulator and select the round type to start a rep with this prompt.
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