Ballpark #40 — answers
September 3, 2026 · five estimation questions and their accepted values
Question 1
What is the coldest temperature ever recorded on Earth, in Celsius below zero?
89
Vostok Station, Antarctica, 1983: −89.2 °C.
Question 2
How long is Earth’s circumference at the equator, in kilometers?
40075
Question 3
How many years did the Hundred Years’ War actually last?
116
1337 to 1453.
Question 4
How much does a concert grand piano weigh, in kilograms?
500
A 9-foot concert grand runs roughly 480–550 kg.
Question 5
How many players from one team are on a basketball court?
5
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