#include <fstream>
using namespace std;
int n,i,a,b,c;
int main()
{
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f >> n;
    for (i=1;i<=n;i++)
    {
        f >> a >> b;

        while (b)
        {
            c=a%b;
            a=b;
            b=c;
        }
        g << a << '\n';
    }
    return 0;
}