#include <fstream>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{
    int t,a,r,b;
    fin >> t;
    for(int 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;
}