#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    long int n;
    long int a,b;
    long int r;

    fin>>n;

    for (int i = 1 ; i <= n ; i++)
    {
     fin>>a>>b;

     while (b != 0)
     {
      r = a % b;
      a = b;
      b = r;
     }

     fout << a << endl;
    }

    return 0;
}