What's the average thickness of the Earth's crust?
How many bricks are in the Great Wall of China?
What is the population of the United States?
What's the average wattage of a household microwave?
How much water does the average person drink per day?
What's the average annual budget for a small business in the U.S.?
What is the total length of the human circulatory system?
How many gallons of paint are needed to paint the White House?
How much electricity does the average solar panel generate?
How much does the average bicycle weigh?
What's the average growth rate of human hair?
What's the average speed of a rabbit?
What's the market cap of Intel?
What's the average temperature of the surface of the Sun?
What's the speed of the fastest recorded baseball pitch?
How much caffeine is in a typical cup of coffee?
What's the diameter of a basketball?
At what speed does light travel in a vacuum?
How long is the Great Wall of China?
What is the market capitalization of Apple Inc.?
What's the average size of a car parking space?
How long does it take for the Moon to rotate once on its axis?
What's the average upload speed of 4G LTE?
What's the average speed of the Mississippi River?
What's the density of copper (in g/cm³)?