Earlier quoted context omitted.
The 747 ping pong ball estimation problem is a Fermi problem, where the goal is to get the right order of magnitude of the answer. Sure. But "why are manhole covers round?" is not. It's a stupid "have you ever heard this clever fact" question that's often designed just to figure out if you're clever and/or lucky vs testing actual knowledge and skill. If your aim in interviewing is to fill the team with people who lov…
I worked and interviewed a lot of people in business consulting. We did ask what you call Fermi problems as they are surprisingly representative of the abstract thinking that is required in the job, specifically proposing frameworks for what kind of information we need to either go and get or state as assumptions in order to support a decision. As the GP points out, the questions are testing how you model something y…
I personally didn't understand what these types of questions would accomplish, but your explanation makes sense and it seems like this would be a good tool in the hiring toolkit.