Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
25
kiwifruit
How to estimate it
Fermi’s official “Napkin math”
A kiwi bird is about the size of a chicken. How heavy is that? Maybe 2.5 kilograms, so 2,500 grams. A kiwifruit sits in your palm, call it 100 grams.
- Kiwi bird
- ~2,500 g
- One kiwifruit
- ~100 g
- 2,500 ÷ 100
- ≈ 25
A kiwi bird is about the size of a chicken. How heavy is that? Maybe 5 pounds, which is 80 ounces. A kiwifruit sits in your palm, call it 3 ounces.
- Kiwi bird
- ~80 oz
- One kiwifruit
- ~3 oz
- 80 ÷ 3
- ≈ 27
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Adult North Island brown kiwi, midpoint of male 2 kg and female 2.7 kg
- ≈ 2,350 g
- Average Zespri Green kiwifruit
- ÷ 92.5 g
- 2,350 ÷ 92.5
- ≈ 25
Reference cited by Fermi: New Zealand Birds Online (Te Papa and Birds New Zealand), North Island brown kiwi: 2 kg male, 2.7 kg female · Zespri, average Green kiwifruit weight of 92.5 g
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