# Follow the path of relation through the grid #2

There is a relation between rectilinear-adjacent squares such that there is a unique rectilinear path from the top-left corner of the grid down to the bottom-right corner of the grid. Each square can participate in the path only once. What is the relation and the path it induces?

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## 1 Answer

The path is follows

And the relationship is

Two numbers on the path are adjacent if and only if they are both even.
The path is unique under this requirement.