I can tell your last name by reading your palm, and I won't let you say it. I don't need anything! Do you believe it or not? Seeking principle

Math problems have nothing to do with palms. Smoke screen After careful study, I understand: when you find out the cardboard with your surname written on it and put it in the box with your surname written on the ground, he will already know what your surname is, because what you get is the same as the box on the ground, that is your surname! I was suspicious when I found this, but it's not surprising after a little calculation. Suppose there are 16 boxes and 10 cardboard on the ground, then he can have 160 combinations, which means he can accurately judge 160 surnames!