Standing on top of the answer
Most students will have that piece of clothing that they would use on every exam as a lucky charm. You will see them come into the classroom with the same socks or t-shirt every time they are about to take a test. Sometimes you need luck on your side.
But you shouldn’t just rely on luck. If you have sneakers with a white rubber sole, you can write all the answers on them. No one would suspect of having the answers beneath your feet. Now, the hard part is to turn them upside down without looking suspicious.