Ballpark #46 — answers
September 9, 2026 · five estimation questions and their accepted values
Question 1
How many carats is the largest cut diamond in the world?
530
Cullinan I, the Great Star of Africa: 530.4 carats.
Question 2
How far does light travel in one second, in kilometers?
299792
Question 3
How many books are in the Protestant Bible?
66
Question 4
How high is a regulation basketball hoop, in meters?
3.05
Question 5
How far does an Arctic tern migrate each year, in kilometers?
70000
Round trip; some tracked birds cover 90,000 km.
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