If you’re posting “solve if ur genius” posts on LinkedIn, I can come to three conclusions.
If you post them, I know you are willing to waste everyone’s time.
If you respond to them, I know you are willing to waste your own time.
If you get the answer wrong, I know you are going to waste my time.
Think of those “genius” posts on LinkedIn, as annoying as they are, along with all the other drama, politics and nonsense that people respond to, as a quick litmus test of whether you would want to hire the person, work with them, recommend them, or be connected on LinkedIn with them.