Quiz is a game based on competing in general knowledge, and participating in various types of quizzes has recently become a more popular hobby and pastime. The aim of this study was to determine how intelligence and personality traits affect differences in success in a quiz simulation task, i.e., the individual level of general knowledge. Data were collected online from a sample of 191 quiz participants (74.9% male), individuals who reported regularly participating in quiz-related activities. The results show that crystallized intelligence and the personality trait of openness are positively correlated with performance in the quiz task, while agreeableness showed a negative correlation. Differences in the level of general knowledge were also associated with certain sociodemographic characteristics, with male participants performing better than female participants and older participants outperforming younger ones. By combining variables of intelligence, the Big Five personality traits, age, and gender, we were able to explain 27% of the variance in performance in the quiz simulation task. Intelligence made the largest contribution in this model, explaining 10% of the variance, followed by age with just under 8%. While personality did not have a major role in explaining the variance in general knowledge level (4%), it still made a significant independent contribution. The obtained results suggest that, despite the construct of general knowledge showing most of the expected associations in this sample as well, there is still plenty of room for various other factors that could explain quiz success.