2017 Iran TST2 P2
Source: 2017 Iran TST second exam day1 p2
April 23, 2017
IranIranian TSTnumber theorycombinatorics
Problem Statement
Find the largest number that for which there exists positive integers such that non of them divides another one, but between every three of them, one divides the sum of the other two.Proposed by Morteza Saghafian