I applied on LinkedIn, and some recruiter reached out to me two months later. By that time, I had already switched to a new job, but I decided to give the interview anyway.

The first round was some phone screen. I was asked an obscure math puzzle.

After 20 minutes, I realized I was not making any headway on it. I asked the interviewer to ask me something else, possibly more relevant to the job profile, in the interest of time.

He didn't agree, so I spent the rest of the hour scribbling on my notepad, while the interviewer seemed to be getting bored on the other end.

I tried speaking with the recruiter post-interview, but she started ghosting after the interview.

I didn't make it past the round, of course. But then, if they're making a hire/no-hire decision based on a puzzle round, then I don't know what to say.

A math puzzle about people standing in a circle, and the k'th person getting shot repeatedly. Find the last man standing.