The way of thinking logically and reasoning in number theory courses can be seen by the number of proofs of the properties of numbers in some basic set of numbers. This qualitative research aims to analyze student creativity in solving proving questions directly. The research involved 37 third semester students taking lectures on number theory. Data collection techniques provide questions then students with their own desires go to work in front of the class. Data analysis was performed by analyzing the creativity of the evidence carried out by students fulfilling which aspects of the aspects of creative thinking behavior and indicators of creative thinking abilities based on Mahmudi. A total of four students have been able to use the proving tools provided. The four students are creative because they meet at least one indicator of the ability to think creatively based on Mahmudi, student creativity in proving only 10.1% of the total number of students involved in this study. This can be seen from the one given problem which can only emerge four evidentiating creatives from the ten existing evidences. Thus, the class is included in the creative class. In addition, it is analyzed based on the number of students who are creative, more creative where in the class, male or female students. The results of research on this matter are more creative female students male students.