The purpose of the exercise was not to complete the rubik cube solver, but rather to understand the problem solving process. The group that struggles to complete the project on his or her own might find it difficult to work in teams. Yet this person is very independent and may make an excellent leader. The resourceful, internet savy user will still undergo the challenges of completing the puzzle, but is willing to seek assistance. This person often works well in teams or research groups. The deconstructors are also excellent problem solvers. They have recognized a second way to complete the task. By understanding the objective, they solve the problem by fixing structure of the cube. Lastly, the sly fellow who purchases the speed cube shop may be resourceful, and perhaps the smartest of all the candidates. The person identified the simplest approach to completing the assigned task. As a word of caution, this person may be sneaky, so use careful consideration when hiring this person. Make sure that their solution is not to throw money at a problem.
Some people will not complete the cube, still consider hiring them as they may have other outstanding qualities that may benefit your company. Do not use this as a final criterion!