Student's open-mindedness behavior in solving math-based problem with contradictory information and problem with no specified universal set

The purpose of this research is to describe students' open-mindedness behavior in solving math-based Problems With Contradictory Information (PWCI) and Problems with No Specified Universal Set (PWNSUS). This qualitative descriptive study uses the steps of (1) giving math-based questions Problems With Contradictory Information (PWCI) and Problems with No Specified Universal Set (PWNSUS) to three groups, each group consisting of 3 students, (2) direct observation by noting and recording research subjects when solving problems, (3) describing students' open-mindedness behavior based on video recordings and direct notes during research along with the subject's answer sheets, (4) triangulating with interviews, and (5) concluded the students' open-mindedness behavior in solving problems. The results of this study are Open-mindedness behavior of students when completing about math-based problems with Contradictory Informatand Problem with no specified universal sett hat is, some students conduct discussions with other friends to determine the right conclusions, accept logical arguments and evidence from friends so that they can think again in the completion process. Meanwhile, they also confirmed to the mathematics teacher for the answers to the conclusions they had discussed together However, on the other some of them haven't behaved yet Open-mindedness. They worked on the questions individually, did not discuss with other friends, and did not conformm with the mathematics teacher even though they felt confused when working on the questions. They choose silence with the answers they have written.