Einstein was one of the smartest men to ever exist. That's why it'll make you feel incredibly intelligent if you can solve the riddle that he created. Don't worry, because you don't have to be a genius in order to figure it out. You just have to do some deep thinking.
If you want to challenge yourself, here's the riddle that you should try to solve:
If you could solve the riddle created by Einstein himself, then you should be proud of yourself! Were you actually able to solve the riddle? How long did it take you to figure it out?