Top network posts

• 99 Prove that at a party of $25$ people there is one person knows at least twelve people.
• 57 Probability that Ken and John set next to each other
• 37 What can I do if a student in my lab threatens to tell lies about me, and my advisor doesn't want to fire her?
• 31 How are proofs formatted when the answer is a counterexample?
• 30 Give a concrete sequence of rationals which converges to an irrational number and vice versa.
• 28 At each step of a limiting infinite process, put 10 balls in an urn and remove one at random. How many balls are left?
• 25 Which week day(s) cannot be the first day of a century?
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