Ballpark #53 — answers
September 16, 2026 · five estimation questions and their accepted values
Question 1
How many countries does the Amazon rainforest span?
9
Question 2
How many liters of water does it take to produce one kilogram of beef?
15000
Total water footprint, feed included.
Question 3
How tall is the tallest roller coaster, in meters?
139
Kingda Ka at Six Flags Great Adventure.
Question 4
How many butterfly species have been described?
20000
Question 5
How many hours is a non-stop flight from London to Sydney?
20
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