3QUESTION 3 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
2,300,000
teeth
How to estimate it
Fermi’s official “Napkin math”
Wembley holds 90,000 people. A full adult set is 32 teeth. How many does a typical adult still have? Plenty of people have had their wisdom teeth out or lost a couple. Call it 28.
- Wembley seats
- 90,000
- Teeth per adult
- × 28
- 90,000 × 28
- ≈ 2,500,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Wembley Stadium seats (Wembley's official figure)
- 90,000
- Average natural teeth per adult with teeth (Adult Oral Health Survey 2021, England)
- × 25.4
- 90,000 × 25.4
- ≈ 2,290,000
- ≈
- 2,300,000
Reference cited by Fermi: Wembley Stadium (90,000 seats) and the Adult Oral Health Survey 2021 (25.4 natural teeth on average)
How close was your guess?
Your comparison will appear here.
Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.