#include <iostream>
#include <fstream>

using namespace std;

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

int a, b, c, n, i;

int main()
{
    fin >> n;
    for (i = 1; i <= n; i++)
    {
        fin >> a >> b;
        while (b > 0)
        {
            c = a % b;
            a = b;
            b = c;
        }
        fout << a << "\n";
    }
    return 0;
}