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MathNet 2013 Question 35

Math Olympiad Vault · MathNet 2013

Question 35

2014 scientists attend a congress, each either a mathematician or a physicist. Physicists always lie, and mathematicians always tell the truth except when mistaken. At the final dinner they sit around a circular table, and everyone claims to sit between a mathematician and a physicist. Exactly one absent-minded mathematician made a mistake. How many physicists attend?