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Past exams available here (I looked at Math 2020, Science & English 2021): https://www.kice.re.kr/boardCnts/list.do?
385,502 views
3 years ago
Thanks to Hyeong-jun (H. J.) for emailing me this problem! This is a challenging problem from the math section of the 1997 CSAT, ...
1,370,498 views
6 years ago