Ballpark — July 31, 2026
Answers to that day's 5 daily estimation questions.
Active languages in the world today
7,000 languages
About half are endangered.
Percentage of US adults with a college degree
~50%
Includes both associate and bachelor's degrees.
Words in a typical 300-page novel
90,000 words
Standard estimate of 300 words per page.
Pianos in New York City
20,000 pianos
A classic "Fermi problem" estimation.
Years the Berlin Wall stood
28 years
1961 to 1989.