Ballpark #31 — answers
August 25, 2026 · five estimation questions and their accepted values
Question 1
How tall are the letters of the Hollywood sign, in meters?
14
Question 2
How many ridges are on the edge of a US quarter?
119
Question 3
How old is the oldest known living tree, in years?
4850
Methuselah, a bristlecone pine.
Question 4
How long is London's M25 orbital motorway, in kilometers?
188
Question 5
How much does a standard Good Delivery gold bar weigh, in kilograms?
12.4
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