#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{   int n,a,b,r,i;
    fin>>n;
    for(i=0;i<n;i++)
        {fin>>a>>b;
         while(b!=0)
                {r=a%b;
                 a=b;
                 b=r;
                }
        fout<<a<<"\n";
        }

    return 0;
}