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