#include <fstream>

using namespace std;
int a,b,r,n,i;
int main()
{
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>a>>b;
        r=a%b;
        while (r!=0)
        {
            a=b;
            b=r;
            r=a%b;
        }
        g<<b<<'\n';
    }
    f.close();
    g.close();
    return 0;
}