#include <fstream>

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

    return 0;
}