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

  return 0;
}