Ballpark #18 — answers
August 12, 2026 · five estimation questions and their accepted values
Question 1
How deep is the Grand Canyon at its deepest point, in meters?
1857
Question 2
How many piano concertos did Mozart write?
27
Question 3
How much does a mid-size cumulus cloud weigh, in kilograms?
500000
The classic meteorologists' estimate.
Question 4
How tall is Christ the Redeemer in Rio, including its pedestal, in meters?
38
Question 5
How many eggs does a modern laying hen produce per year?
300
Commercial laying breeds.
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