Pentomino is to tile a rectangular box with the pentomino blocks, i.e. cover it without overlap and without gaps.
A pentomino block is a plane geometric figure formed by joining five equal squares edge to edge
Each of the 12 pentomino blocks has an area of 5 unit squares, so the box must have an area of 60 units.
What's new (v1.0)
This update from Apple will improve the functionality of this app. No new features are included.