Ballpark — March 31, 2026
Answers to that day's 5 daily estimation questions.
Bones in an adult human body
206 bones
Many bones fuse together as we grow.
Countries in Africa
55 countries
Diverse cultures and landscapes across the landmass.
Seconds in a single day
86,400 seconds
24 hours * 60 minutes * 60 seconds.
Weight of a typical bowling ball
12 lbs
Most adults use between 10 and 16 lbs.
Percentage of the world that is water
71%
Most of this is salt water in the oceans.