#include <fstream>
using namespace std;
ifstream f ("euclid2.in");
ofstream g ("euclid2.out");
int a,b,r,t;
int main ()
{
    f >> t;
    for (;t > 0; --t)
    {
        f >> a >> b;
        while (b != 0)
        {
            r = a % b;
            a = b;
            b = r;
        }
        g << a << '\n';
    }
    g.close ();
    return 0;

}