#include<fstream>

using namespace std;

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

int i,n,a,b,r;

int main()
{
    f >> n;

    for(i = 1; i <= n; ++i)
    {
        f >> a >> b;

        while(b != 0)
        {
            r = a % b;
            a = b;
            b = r;
        }

        g << a << '\n';
    }

    return 0;
}