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