#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int t, a, b, r;

    fin >> t;
    for (int contor = 1; contor <= t; contor++)
    {
        fin >> a >> b;
        while (b)
        {
            r = a % b;
            a = b;
            b = r;
        }
        fout << a << endl;
    }

    fin.close();
    fout.close();
    return 0;
}