2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77437Rabbi Abraham Ben Meir Ibn Ezra's(1089-1164) computation of the seventh row of the so-called Pascal-Chu triangle is described.3 pages (plain TeX), A Spanish translation is to appear in La Gaceta (The Spanish analog of the Amer. Math. Monthly)Combinatoricstext