Estimation question
How many people are playing golf in the world right now?
- Walmart
- Estimation
- Easy
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What this question tests
Estimation requiring reasoning about time zones and activity windows, not just total participation numbers.
How to approach it
- Estimate the global golfer population, assuming roughly 60 million people play golf at least occasionally worldwide.
- Estimate how often an average golfer plays, assuming about once every two weeks, meaning roughly 1 in 14 golfers play on a given day.
- Calculate daily golfers: 60 million divided by 14 gives roughly 4.3 million people playing golf on an average day.
- Account for right now meaning only some time zones are in playable daylight hours at once, assuming roughly 1 in 6 of the world qualifies.
- Calculate: 4.3 million divided by 6 gives roughly 700,000 people playing golf at this exact moment.
- State the final estimate as a range, roughly 500,000 to 900,000, given uncertainty in each assumption.
What a strong answer includes
- Correctly incorporates the right-now time-zone constraint, a detail many candidates miss by just estimating total daily golfers.
- Builds the estimate from a defensible chain, total golfers, play frequency, daylight window, rather than guessing directly.
- States each assumption explicitly and gives a final range.
- Sanity checks the time-zone fraction against how many hours of daylight golf-playing regions have at once.
Common mistakes
- Ignoring the right-now time-of-day constraint and just estimating total daily players.
- Skipping the play-frequency step and assuming all golfers play every day.
- Presenting a single precise number with no stated assumptions.
Likely follow-up questions
- How would seasonality change this estimate?
- What would change your assumption about play frequency?
- How would you validate the global golfer population figure?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 2: Data fluency: SQL, logs, and reading the truth yourself
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 14: Get the job: the AI PM interview loop