#include <iostream>
#include <fstream>
using namespace std;
ifstream f ("euclid2.in");
ofstream g ("euclid2.out");
int main()
{
    int t, i, a, b, r;
    f>>t;
    for (i=1; i<=t; i++)
        {
            f>>a>>b;
            while (b)
                {
                    r=a%b;
                    a=b;
                    b=r;
                }
            g<<a<<endl;
        }
    f.close ();
    g.close();
    return 0;
}