Octagonal Prism Puzzle

This puzzle is a version of a Rubik’s Cube with twelve of the small cubes making up the Rubik’s Cube cut in half so the resulting shape is an octagonal prism, a solid with ten faces, two parallel octagons that are connected by eight rectangles. There are several names for this puzzle: Octagonal Prism Puzzle, Magic Octagonal Prism, The Barrel, and The Octagon.
In the solved position four of the rectangles connecting the octagons are made up of three small squares (gray, turquoise, green and dark blue) that correspond to center rows of the Rubik’s Cube. The other four rectangles are made up of three rectangles (orange, pink, yellow, or purple) with one dimension the edge of the small square and the other the diagonal of that square. The two octagonal faces are red and white.
Although there are slightly fewer possible arrangements of the individual pieces that for the Rubik’s Cube, there are situations that can occur that cannot occur while solving the Rubik’s Cube, making the solution somewhat more complicated
This puzzle was made in about 1981. It is among Rubik’s Cube related items from the Cube Museum, which operated in Grand Junction, Colorado, from 1988 to 1991. For more information about the Rubik’s Cube and other twisting puzzles that use the same or similar mechanisms see 1987.0805.01.
Currently not on view
Object Name
date made
ca 1981
Physical Description
paper (overall material)
plastic (overall material)
metal (overall material)
overall: 5.5 cm x 5.5 cm x 5.5 cm; 2 5/32 in x 2 5/32 in x 2 5/32 in
ID Number
catalog number
accession number
Mathematical Recreations
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Twisting Puzzles
Data Source
National Museum of American History, Kenneth E. Behring Center


Add a comment about this object