The answer is The 9 Dots Puzzle. In case you don’t know it, here’s what it says:There are 9 dots in a paper. They're arranged in 3 lines, forming a square (see the picture). Your task is to link the 9 dots with a pen, without lifting it from the paper, with 4 or fewer straight lines.9 DotsIf you didn't know the puzzle, I challenge you to get your best answer. I'm totally going to spoil it in this thread. Come on. Think a little. Did it with 4 lines? Cool. I did it with 1. Now t...