Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Na Machị 1970, Larry D. Nichols mepụtara 2×2×2 "Puzzle with Pieces Rotatable in Groups" ma tinye akwụkwọ maka patent Canada maka ya. Ihe ndị na-ejikọta cube Nichols bụ ihe ndị na-ejikọta magnet. E nyere Nichols patent US 3,655,201 na 11 Eprel 1972, afọ abụọ tupu Rubik mepụta Cube ya.  Ajụjụ: Olee mgbe Nichols tinyere akwụkwọ maka patent nke cube ya?
Mach afọ 1970