This is the classic brainteaser, straight to you from Microsoft (the originator). Even though this question has been around for years, interviewees still encounter it.
Here's how to "solve" this brainteaser. Remember to speak and reason out loud while solving this brainteaser!
Why are manhole covers round? Could there be a structural reason? Why aren't manhole covers square? It would make it harder to fit with a cover. You'd have to rotate the cover exactly the right way. Therefore, many manhole covers are round so they don't need to be rotated. There are no corners to deal with. Also, a round manhole cover won't fall into a hole because it was rotated the wrong way, so it's safer.
There may be other reasons why corners are a problem and why a round shape is better. You can't cut yourself on a round manhole cover. And because it's round, it can be more easily transported. One person can roll it.
This is question you are almost guaranteed to receive in any interview. And although you may think it's a softball question—one easily answered by spouting out a few facts gleaned from a Google search—this couldn't be further from the truth.
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, depending on the question).
The journey to becoming an attorney is a windy road filled with late-night study sessions, high-pressure exams, and tough competition—all of which can contribute to mental health challenges. With an estimated 40% of law students experiencing depression by graduation, it is important to understand that you are not alone if you are suffering from depression.