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MathNet 2026 — Part 01 Question 8

Math Olympiad Vault · MathNet 2026 — Part 01

Question 8

On a circle were marked $15$ white dots and $1$ black dot. Let us consider all possible polygons (convex) with their vertices at these points. Let's separate them into two types: - Type 1: those that have only white vertices. - Type 2: those who have the black dot as one of the vertices. Are there more type 1 or type 2 polygons? How many more are there?