Ballpark — March 28, 2026
Answers to that day's 5 daily estimation questions.
About how many inches does human hair grow in a year on average?
~6 inches/year
Hair grows about half an inch per month on average.
Total height of all peaks in the Tour de France
150,000 feet
Cumulative elevation gain over 21 stages.
Max speed of a professional hockey puck
110 mph
Recorded during the NHL Skills Competition.
Lightbulbs on the Las Vegas Strip
12.0 million bulbs
Including massive LED displays and marquee signs.
Cost of a 30-second Super Bowl commercial
7 USD (millions)
Prices have doubled in the last 15 years.