Ballpark #28 — answers
August 22, 2026 · five estimation questions and their accepted values
Question 1
How deep can a sperm whale dive, in meters?
2000
Recorded dives reach about 2,250 m.
Question 2
How many books are in the main Harry Potter series?
7
Question 3
How many carats is the Hope Diamond?
45.5
Question 4
How many steps are in Rome's Spanish Steps?
135
Question 5
How fast does the International Space Station orbit Earth, in km/h?
27600
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