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MathNet 2022-part-01 — 197 problems (EN–VI) Question 22

Math Olympiad Vault · MathNet 2022-part-01 — 197 problems (EN–VI)

Question 22

Consider the following arrangement of 25 points.

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Gastón must choose 4 of these points. The chosen points must be the vertices of a square. In how many ways can this be done?