MathDB
BMT 2013 Spring - Discrete 7

Source:

January 6, 2022
number theory

Problem Statement

Denote by S(a,b)S(a,b) the set of integers kk that can be represented as k=am+bnk=a\cdot m+b\cdot n, for some non-negative integers mm and nn. So, for example, S(2,4)={0,2,4,6,}S(2,4)=\{0,2,4,6,\ldots\}. Then, find the sum of all possible positive integer values of xx such that S(18,32)S(18,32) is a subset of S(3,x)S(3,x).