#include<fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int a,b,r,t,i;
int main()
{ f>>t;
  for(i=1;i<=t;++i) { f>>a>>b;
                      while(b) { r=a%b;
			                     a=b;
			                     b=r;
		                        }
					  g<<a<<'\n';
                     }
  return 0;
}