#include <fstream>
using namespace std;
int main()
{
    ifstream f ("euclid2.in");
    ofstream g ("euclid2.out");
     int n,a,b,r;
    f>>n;
    for(int i=0;i<n;i++)
    {
        f>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        g<<a<<endl;
    }
    f.close();
    g.close();
}