The answer keys for the Korean and mathematics sections of the September nationwide joint academic evaluation (mock exam) for high school seniors, part of the 2027 academic year College Scholastic Ability Test (CSAT) cycle, were released on the 2nd. Test-takers can grade their performance by comparing their answers with the released answer keys for each subject.

The results of self-grading can be used to assess one's current academic level and weak areas, and to establish study strategies for the remaining period before the CSAT. Rather than simply checking whether answers are correct, it is important to also review areas where time was insufficient during the problem-solving process and questions where concepts were unclear.

This September mock exam was administered by the Korea Institute for Curriculum and Evaluation. As it is a test conducted by the CSAT's testing agency, it is regarded as one of this year's major exams. Test-takers need to evaluate their level of mastery in each subject based on the results of this exam and specify the areas they should intensively improve during the remaining time. Attention is also focused on the grade cutoffs to be announced later.

Meanwhile, the following are the answer keys for the Korean and mathematics sections of the 2026 nationwide joint academic evaluation (mock exam) administered on the 2nd.