#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 != 0)
        {
            rest = nr1%nr2;
            nr1 = nr2;
            nr2 = rest;
        }
        fout<<nr1<< "\n ";


    }
    return 0;

}