First select difficulty, you can change this even during the quiz after any question.
easy - only 3 available answers, slightly easier questions. For each right answer your score will increase by 1, for every wrong answer your score will decrease by 2.
medium - 4 available answers. For each right answer your score will increase by 1.5, for every wrong answer your score will decrease by 1.5.
easy - 5 available answers, slightly more difficult questions may appear. For each right answer your score will increase by 2, for every wrong answer your score will decrease by 1.
