//
//  main.cpp
//  euclid2
//
//  Created by Florian Marcu on 4/8/21.
//

#include <fstream>

using namespace std;

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

int main() {

    int T, a, b, r, i;

    fin >> T;

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

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

        }
        fout << a << "\n";
    }

    return 0;
}