Ballpark #22 — answers
August 16, 2026 · five estimation questions and their accepted values
Question 1
How tall is the Tokyo Skytree, in meters?
634
Question 2
How many tennis balls does Wimbledon use per tournament?
55000
Tournament-cited estimate.
Question 3
How much does an adult giant panda weigh, in kilograms?
100
Adults range roughly 80 to 120 kg.
Question 4
How long is the Panama Canal, in kilometers?
82
Question 5
How many beetle species have scientists described?
400000
Described species; the true number is far higher.
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