# include <fstream>
# include <algorithm>
# include <vector>
# include <cstring>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int a,b,R,i,n;
int main ()
{
    f>>n;
    for (i=1; i<=n; ++i)
    {
        f>>a>>b;
        while (b!=0)
        {
            R=a%b;
            a=b;
            b=R;
        }
        g<<a<<"\n";
    }

    return 0;
}