Mathematical trickery Memes

The ultimate calculus bamboozle! Asking for the derivative (d/dx) of someone's credit card number is pure mathematical trickery. Why? Because if you know the derivative, you can just integrate it to get back the original function (with only a harmless constant off). It's like saying "Don't tell me your password, just tell me your password minus 5" — you're still giving away the goods! The dollar signs in the second panel really drive home that this is basically a mathematician's version of a heist. Sneaky differential equations strike again!