#include <fstream>
using namespace std;

int main()
{
    ifstream fin("euclid2.in");
    ofstream fout("euclid2.out");

    int T;
    fin >> T;

    int a, b, r;

    for (int i = 1; i <= T; i++)
    {
        fin >> a >> b;

        while (b != 0)
        {
            r = a % b;
            a = b;
            b = r;
        }

        fout << a << endl;
    }

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

    return 0;
}