How many gallons of white house paint are sold in the United States every year?
The "Start Big" approach: If you're not sure where to begin, start with the basic assumption that there are 320 million people in the U.S. (or 30 million businesses,...
Brainteasers and Guesstimates Questions
How many square feet of pizza are eaten in the United States each month?
Start with the rough figure of 300 million people in America. How many people eat pizza? Let's say 200 million. Now let's say the average pizza-eating person eats...
What is the size of the market for disposable diapers in China?
Here's a good example of a market sizing. How many people live in China? A billion. (For a guesstimate, that's close enough to the actual figure of 1.3 billion.)...
Why are manhole covers round?
This is the classic brainteaser, straight to you from Microsoft (the originator). Even though this question has been around for years, interviewees still encounter...