2QUESTION 2 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
65
attacks
How to estimate it
Fermi’s official “Napkin math”
Shark attacks are rare enough that nearly every one makes the news, wherever in the world it happens. How often do you see one? Feels like about once a week.
- Weeks in a year
- 52
- Attacks a week, worldwide
- × 1
- 52 × 1
- ≈ 52
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- United States
- 25
- Australia
- 21
- Rest of the world
- 19
- ≈
- 65
Reference cited by Fermi: Florida Museum's International Shark Attack File annual report
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.