square divides into 25 unit squares Puerto Rico TST 2019.1
Source:
September 16, 2021
combinatoricscombinatorial geometrySquares
Problem Statement
A square is divided into unit squares by drawing lines parallel to the sides of the square. Some diagonals of unit squares are drawn from such that two diagonals do not share points. What is the maximum number diagonals that can be drawn with this property?