minimum # of questions to find arrangement of 7x7 board
Source: Serbia MO 2006 3&4th Grades P4
April 10, 2021
gamecombinatorics
Problem Statement
Milos arranged the numbers through into the cells of a board. Djordje wants to guess the arrangement of the numbers. He can choose a square covering some cells of the board and ask Milos which numbers are found inside that square. At least, how many questions does Djordje need so as to be able to guess the arrangement of the numbers?