Ballpark #17 — answers
August 11, 2026 · five estimation questions and their accepted values
Question 1
How long is the Suez Canal, in kilometers?
193
Question 2
At what temperature does water boil on the summit of Mount Everest, in Celsius?
71
Question 3
How much gold is stored in Fort Knox, in metric tons?
4580
The commonly cited US Treasury figure.
Question 4
How many times does a hummingbird beat its wings per second?
50
Typical; some species hit 80.
Question 5
How tall is the Washington Monument, in meters?
169
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