Ballpark — May 8, 2026
Answers to that day's 5 daily estimation questions.
Total weight of the Great Pyramid of Giza
~6 million tons
Built from 2.3 million limestone blocks.
About what is the diameter of a tennis ball?
~6.7 cm
A tennis ball is a bit under 3 inches across.
About what is the diameter of a ping-pong ball?
~40 mm
Modern table tennis balls are about 40 mm in diameter.
About how many calories are in a typical slice of cheese pizza?
~285 calories
A slice of cheese pizza is often around 250–350 calories.
About how much does a large egg weigh (with shell)?
57 g
A large egg is typically in the mid-50 gram range.