Ballpark — August 18, 2026
Answers to that day's 5 daily estimation questions.
About what is the diameter of a golf ball?
~4.3 cm
A golf ball is about 1.7 inches across.
Total student loan debt in the US
1.7 USD (trillions)
Has more than doubled in the last decade.
Speed of a cheetah at full sprint
70 mph
Can only maintain this for about 30 seconds.
Volcanoes currently erupting on Earth
20 volcanoes
Usually 20 to 30 at any given time.
Duration of the shortest war in history
38 minutes
The Anglo-Zanzibar War of 1896.