QR-Code CubeA custom sticker variant showing six different 2D-barcodes.
Quad-XAn edge turning hexahedron with cuts deeper than the Helicopter Cube.
QuadStarQuadStar is a non-shape-shifting jumbling puzzle based on the snub disphenoid, elongated at the four five-way vertices.
QuadrangleA two-layered prism with 120°-turns at the four arms. Even more amazing: It is the first known self-dual puzzle.
Quadrastic-4A variant of the Tetrakium bandaged in a highly symmetrical fashion.
Quadratic prismA 3x3x3 with two axes restricted to 180� turns but still looking like a 3x3x3.
QuadriA very rare version of the original Swissmad. It presumably never made it into production.
QuadrismFive circles rotating by 90°, one of them spanning almost the whole puzzle.
Quadro 3An redesigned and improved version of Slide Rule Duel.
QuadrocollideThree circles of different sizes, all of which rotate by 90° and intersect.
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