2QUESTION 2 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
100
bones
How to estimate it
Fermi’s official “Napkin math”
The easiest place to start is the 206 bones in a skeleton. How many go with one hand? About three per finger, one behind each finger in the palm, and maybe 5 in the wrist. A foot is built much the same.
- Bones in a skeleton
- 206
- One hand: 15 finger + 5 palm + 5 wrist
- ≈ 25
- 25 × 4 hands and feet
- ≈ 100 lost
- 206 − 100
- ≈ 106
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Each hand: 8 wrist + 5 palm + 14 finger bones
- 27
- Each foot: 7 tarsals + 5 metatarsals + 14 toe bones
- 26
- (27 + 26) × 2
- 106
- 206 − 106
- 100
Reference cited by Fermi: Cleveland Clinic and Kenhub anatomy guides
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.