max no of real numbers in a board such for any 2 their product is included
Source: Czech-Polish-Slovak Junior Match 2012, Team p1 CPSJ
March 12, 2020
maxcombinatoricsProduct
Problem Statement
There are a lot of different real numbers written on the board. It turned out that for each two numbers written, their product was also written. What is the largest possible number of numbers written on the board?