This website contains problems from math contests. Problems and corresponding tags were obtained from the Art of Problem Solving website.

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Found problems: 1

2008 Mathcenter Contest, 10
Tags: combinatorics , this problem is a nightmare
One test is a multiple choice test with $5$ questions, each with $4$ options, $2000$ candidates, each choosing only one answer for each item.Find the smallest possible integer $n$ that gives a student's answer sheet the following properties: In the student's answer sheet $n$, there are four sheets in it. Any two of the four tiles have exactly the same three answers. [i](tatari/nightmare)[/i]