1QUESTION 1 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
358
feet
How to estimate it
Fermi’s official “Napkin math”
How thick is a single bill? Really thin, maybe a tenth of a millimeter. Stack a million of them and it adds up fast.
- Bill thickness
- ~0.1 mm
- × 1,000,000 bills
- = 100 m
- In feet
- ≈ 350 ft
How thick is a single bill? Really thin, maybe a tenth of a millimeter. Stack a million of them and it adds up fast.
- Bill thickness
- ~0.1 mm
- × 1,000,000 bills
- = 100,000 mm
- In meters
- ≈ 100 m
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Thickness of one bill
- ≈ 0.0043 in
- 1,000,000 × 0.0043
- = 4,300 in
- Convert to ft
- ÷ 12 ≈ 358
Reference cited by Fermi: U.S. Bureau of Engraving & Printing
How close was your guess?
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Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.