#include<iostream>
#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 = 0; i < T; i++)
    {
        fin >> a;
        fin >> b;
        while (b != 0)
        {
            r = a % b;
            a = b;
            b = r;
        }
        fout << a << "\n";
    }
    fin.close();
    fout.close();
    return 0;
}