#include <fstream>
using namespace std;

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


int main(){
    int x;
    int nr1,nr2,rest;
    fin>>x;
    for (int i=1; i<=x; i++)
    {
        fin>> nr1 >> nr2;
        while (nr2)
        {
            rest = nr1 % nr2;
            nr1 = nr2;
            nr2 = rest;
        }
        fout<<nr1<< "\n";
    }
    return 0;

}