Fatto generale: 210 is the world speed record (km/h) for a mountain bike on a ski slope.
Fatto matematico: 210 is a composite number, an abundant number, and the product of the first four prime numbers (2, 3, 5, and 7), and thus a primorial.
Trivia: 210 is the world speed record (km/h) for a mountain bike on a ski slope.
Data storica: July 28th is the day in 1945 that a U.S. Army B-25 bomber crashes into the 79th floor of the Empire State Building killing 14 and injuring 26.