#include <fstream>
using namespace std;
int main()
{
    int d, a, b, n, i;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f >> n;
    for(i = 1; i<=n;i++)
    {
        f >> a >> b;
        while(a != b)
        {
            if(a > b)
            {
                a = a - b;
            }
            else
            {
                b = b - a;
            }
        }
         d = a;
        g << d << "\n";
    }
    return 0;
}