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Rotating Hexagon

Author: mathforces
Problem has been solved: 2 times

Русский язык | English Language

The regular hexagon $ ABCDEF $ with a side length of 25 was divided into rhombuses with angles of 60 and 120 degrees with a length of side 1. In one move, you can select any three pairwise adjacent rhombuses that form a regular hexagon with a length of side 1, and rotate them 60 degrees relative to the center of this hexagon. Find the minimum positive integer $ N $ such that from any of our partition of the hexagon $ ABCDEF $ you can get any other such partition in $N$ moves.

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