2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/60119One presents many Concatenated and Operation Sequences, P-Q Relationships, Digital Sequences, Magic Squares, Prime Conjectures, k-Divisibility and Strong Divisibility Sequences, Geometric Conjectures, Proposed problems.16 pages. Tables of numbers. Presented to the Pedagogical High School Student Conference in Craiova, 1969General Mathematics11A99text