MathDB
Iran TST

Source: Iranian TST 2019, first exam day 1, problem 1

June 24, 2019
combinatorics

Problem Statement

A table consisting of 55 columns and 3232 rows, which are filled with zero and one numbers, are "varied", if no two lines are filled in the same way.\\ On the exterior of a cylinder, a table with 3232 rows and 1616 columns is constructed. Is it possible to fill the numbers cells of the table with numbers zero and one, such that any five consecutive columns, table 32×532\times5 created by these columns, is a varied one?
Proposed by Morteza Saghafian