#include <fstream>

using namespace std;

int main()
{
    int T,i,r,x,y;
    ifstream fin("euclid2.in");
    ofstream fout("euclid2.out");
    fin>>T;
    for (i = 1; i <= T; i++)
    {
        fin >> x >> y;
        while(y!=0)
        {
         r=x % y;
         x=y;
         y=r;
        }
        fout << x << "\n";
    }

    fin.close();
    fout.close();

    return 0;
}