Seemingly random questions like this one have become commonplace in Silicon Valley and other tech outposts, where companies aren't as interested in the correct answer to a tough question as they are in how a prospective employee might try to solve it. Since businesses today have to be able to react quickly to shifting market dynamics, they want more than engineers with high IQs and good college transcripts. They want people who can think on their feet.
We got a quote: Valhalla window cleaning service of Seattle says it will do all the residential windows for $90m and all the commercial ones for $100m. Valhalla usually charges $125 for a “normal” 18-window house.