Ballpark — May 17, 2026
Answers to that day's 5 daily estimation questions.
Elevation of the Dead Sea
1,412 feet below sea level
Sinking roughly 3 feet per year.
About how many times does a person breathe in a day?
~20,000 breaths/day
Breathing adds up fast—often around twenty thousand breaths per day.
What temperature is an average household refrigerator set to?
~37 °F
Many fridges are set just above freezing to keep food safe.
About what is normal human body temperature?
98 °F
Normal body temperature is roughly 98–99°F.
How many minutes does it take a recreational runner to run one mile?
~10 minutes
Many casual runners run a mile in about 8–12 minutes.