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In respect to this, how many Pentominoes solutions are there?
Among the trillions of possibilities to arrange the twelve pentominoes in a 6x10 rectangle, there are in excess of 2000 'solutions' which fill the rectangle exactly. According to Arthur C. Clarke's 'Imperial Earth' there are 2,339 solutions.
Likewise, how do you use Pentominoes?
Use one set of pentominoes and a suitable board made of unit-squares. An 8 by 8 is a good size. Players take turns placing a pentomino to cover squares. Pentominoes must fit« the squares and may not overlap any already placed.
A pentomino is a 2D shape made out of 5 side-by-side equal-sized squares. They can be found in the books Chasing Vermeer and The Wright 3.