Ballpark — October 17, 2026
Answers to that day's 5 daily estimation questions.
States in the USA that touch the Pacific Ocean
5 states
CA, OR, WA, AK, and HI.
Species of birds in the world
10,000 species
Estimated by the Cornell Lab of Ornithology.
Gallons of water in an average rain cloud
500,000 gallons
Calculated by the water density in a cumulus cloud.
Total US dollar bills in circulation
54 billion bills
Includes all denominations from $1 to $100.
Total gold ever mined in human history
200,000 tons
Most of it is still in use today.