Ballpark #34 — answers
August 28, 2026 · five estimation questions and their accepted values
Question 1
How many cells are in the human body, in trillions?
37
The widely cited 37.2 trillion estimate.
Question 2
How tall is Cape Town's Table Mountain, in meters?
1085
Question 3
How many symphonies did Beethoven complete?
9
Question 4
What is the maximum takeoff weight of a Boeing 747-8, in tonnes?
448
Question 5
How many potentially active volcanoes are there worldwide?
1350
Smithsonian Global Volcanism Program estimate.
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