You nailed it, again!
Who would have known that nails would come in so handy for passing tests? This hack will have you pasting little pieces of paper with the answers on the inside of your nails. All you have to do is look at your fingers, and you will find what you need.
And let’s be honest, most teachers won’t be able to read something so small, let alone find it. The problem here is that you need to have long fingernails. Or at least buy fake ones, whichever method is more accessible.