Previous research has addressed undergraduate students’ approaches to studying mathematics from various perspective, with differing results regarding influences on achievements. This study contributes to the fields understanding by examine if and how engineering students’ various approaches to studying mathematics, particularly a differential calculus course, affect their success on the course exam. Three questionnaires were distributed to the students and a logistic regression model showed that the habit to study regularly had a positive effect on exam results, whereas the strategy to imitate previous examples had a negative effect.