students’ errors in solving critical thinking problems on linear programing topics

science and technology were growing more rapidly in the industrial revolution 4.0 era. students must have some critical ability to deal with it. one of them is the ability to think critically. critical thinking ability is the ability to use thinking skills to make reasonable decisions. critical thinking skills can be developed through learning mathematics. this paper aims to identify and analyze students error in solving problems that require critical thinking skills on the topic of linear programming. data in this paper were collected using critical thinking skills tests and interview. the research method used is descriptive qualitative. the subjects in this paper were senior high school students in palangkaraya. four indicators of critical thinking skills used to analyze students error. the results of the paper show the subject making several mistakes in solving problems. some students make the same mistakes, some students can solve all problems even though the method used is not right, and the shape of the questions influences students critical thinking ability.