Mathematics is always related to simple problems to complex problems. The problems given affect the thinking process of students. The problem-solving process also requires hard work to overcome the existing difficulties or what is called the adversity quotient. This study aims to determine the thought processes of climber and quitter in solving math problems. This research is qualitative research, with research subjects consisting of nine students from class eleven in senior high school. Subject selection using purposive sampling. The research subjects were selected based on the results of the Adversity Quotient questionnaire. The data collection method in this research is by observation, test, and interview method. Data validation was carried out by method triangulation. The data analysis technique used in this research according to Miles and Huberman, namely data reduction, data presentation, and drawing conclusions or verification. The results showed that the thinking process in solving the problems of the climber and quitter students met the indicators of the predicative thinking process.