Given one set of pentominoes:

Use five (different) pentominoes to build a bridge with a rectangular outer edge.
Magnify this bridge with factor 2.

To build this similar bridge use a set of pentominoes and two sets of tetrominoes.

Extra rule: the same tetrominoes may not touch each other, not even with just a corner
The pentominoes and tetrominoes must lie in a single plane.
Try to maximise the enclosed area.

This Excel file will make searching for a solution a bit easier.
To download it click with the right mouse button and choose ‘Save target as ...’ to save this Excel file on your hard disk or diskette.

An excellent help in searching for solutions is the program “FlatPoly2”. You can download it from the homepage of Aad van de Wetering, Driebruggen.

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