#include <iostream>
#include <fstream>
using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int main()
{
    int n, i, x, y;
    f >> n;
    for (i = 0;i < n;i++)
    {
        f >> x >> y;
        while (y!= 0)
        {
            int r = x % y;
            x = y;
            y = r;
        }
        g << x << " " << endl;
    }
}