filling with cubes a 4x2x2 crate
Source: Portugal OPM 2023 p3
May 15, 2024
combinatoricscombinatorial geometrygeometry3D geometry
Problem Statement
A crate with a base of and a height of is open at the top. Tomas wants to completely fill the crate with some of his cubes. It has equal cubes of volume and two equal cubes of volume . A cube of volume can only be placed on the top layer if the cube on the bottom layer has already been placed. In how many ways can Tom'as fill the box with cubes, placing them one by one?