Ballpark — June 6, 2026
Answers to that day's 5 daily estimation questions.
Cost to build the Golden Gate Bridge (today’s USD)
550 USD (millions)
The original cost was $35 million in 1937 dollars.
Total Super Bowl appearances by Tom Brady
10 appearances
Winning 7 of them.
Population of Madagascar
30.3 million people
Madagascar is the world's fourth largest island.
About what is the diameter of a golf ball?
~4.3 cm
A golf ball is about 1.7 inches across.
About what percentage of all email sent globally is spam?
~45%
A large share of global email traffic is spam—often around half.