#include <fstream>

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

    }


 f.close();
 g.close();
    return 0;
}