#include<fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int t,i,a,r,b;
int main()
{
    fin>>t;
    if(t<=100000&&t>=1)
   {
         for(i=1;i<=t;i++)
        {
         fin>>a>>b;
         while(b!=0)
        {
          r=a%b;
          a=b;
          b=r;
        }
         fout<<a<<'\n';
        }
    }
    fin.close();
    fout.close();
    return 0;
}