3-5-8 for the following: This variation of a variation plays 9-5-2 with the following changes: This variation was played in the 70s and 80s at University High School in Urbana, Ill. Play is as before with each aiming for 9, 5 and 3 respectively, except: 3-5-8 3-5-8, also known as Sergeant Major for its popularity among members of Britain's Royal Air Force, is a trick-taking card game for 3 players, using a standard 52 card deck. 3-5-8 may be played as a gambling game, or not, and there are many variations with names like "8-5-3" and "9-5-2" played throughout the world.
9-orthoplex dual of the enneract with the C or [4,3] symmetry group, and a lower symmetry with two copies of 8-simplex facets, alternating, with the D or [3] symmetry group. Cartesian coordinates for the vertices of a 9-orthoplex, centered at the origin, are Every vertex pair is connected by an edge, except opposites. 9-orthoplex In geometry, a 9-orthoplex or 9-cross polytope, is a regular 9-polytope with 18 vertices, 144 edges, 672 triangle faces, 2016 tetrahedron cells, 4032 5-cells "4-faces", 5376 5-simplex "5-faces", 4608 6-simplex "6-faces", 2304 7-simplex "7-faces", and 512 8-simplex "8-faces". It has two constructed forms, the first being regular