#include <iostream>
#include<fstream>


using namespace std;

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


    return 0;
}