Ballpark — March 6, 2026
Answers to that day's 5 daily estimation questions.
Number of active volcanoes in the world
~1,350 volcanoes
About 50–70 erupt every single year.
Total billionaires in the world
3,428 billionaires
The US has the most, followed by China and India.
Number of moons orbiting Jupiter
115 moons
The four largest (Galilean moons) were seen by Galileo in 1610.
Average words spoken by a person per day
~13,000 words
Research shows men and women speak roughly the same amount.
Number of heartbeats in a human lifetime
~2.5 billion beats
Based on 70 beats per minute over an 70-year life.