#include<fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int x,y,a,b,i,r,T;
int main ()
{
    fin>>T;
    for (i=1;i<=T;i=i+1)
    {
        fin>>a>>b;
        x=a;
        y=b;
        while(y!=0)
        {
            r=x%y;
            x=y;
            y=r;
        }
        fout<<x<<"\n";
    }

    fin.close ();
    fout.close ();
    return 0;

}