2QUESTION 2 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
15,000
blinks
How to estimate it
Fermi’s official “Napkin math”
You blink without ever thinking about it. How often? Maybe 15 times a minute. You're awake around 16 hours, which is about 1,000 minutes.
- Blinks per minute
- ~15
- Waking minutes
- × ~1,000
- 15 × 1,000
- ≈ 15,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Blinks per minute
- ~15-20
- Waking minutes (16 hrs)
- ~1,000
- Roughly
- ≈ 15,000
Reference cited by Fermi: American Academy of Ophthalmology / Harvard: ~15-20 blinks per minute
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.