You can find here https://arxiv.org/abs/1110.1556 https://arxiv.org/abs/1110.1556 infamous "Jewish Problems" that were given to select applicants during entranc

You can find here https://arxiv.org/abs/1110.1556 https://arxiv.org/abs/1110.1556 infamous "Jewish Problems" that were given to select applicants during entrance exams to the math department of Moscow State University. They were designed to prevent Jews from getting a passing grade.