Prince Rupert's cube is named after Prince Rupert of the Rhine, who wagered that a hole could be drilled within a cube, large enough to let another cube of the same size pass through it.
Prince Rupert's cube is named after Prince Rupert of the Rhine. A hole could be drilled within a cube. This was large enough to let another cube of the same size pass through it. Prince Rupert of the Rhine wagered this.