Similar vibe, but I think about this scene/meme a lot as well.
Likewise, Don Draper is being an asshole in the scene. But, in reality most people don't think about you.
They could say something that offended you. They are going to forget about it. So there is no need to be upset, chances are they forgot about it.
You could say something dumb or embarrassing. People are going to forget almost immediately.
What? No. The divisibility of the side lengths have nothing to do with this.
The problem is what's the smallest square that can contain 17 identical squares. If there were 16 squares it would be simply 4x4.