The quiz is the easiest way to earn exp. Each correct answer will earn you 200 exp. However, one wrong answer will end the quiz immediately and result in 0 exp earned. Therefore, if you are unsure of the answer, it is better to let the time run out rather than risk an incorrect guess.
You may take the quiz twice per hour.
If you failed the quiz or just want to get a better score you may do so by spending experience points to restart the quiz.