#include<fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main ()
{
    int t,i;
    int a,b,r,x,y;
    fin>>t;
    for(i=1;i<=t;i=i+1)
    {
        fin>>a>>b;

        x=a;
        y=b;
        while(y!=0)
        {
          r=x%y;
          x=y;
          y=r;
        }
        fout<<x<<"\n";
    }

    fin.close();
    fout.close();
    return 0;
}