#include <fstream>
using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int main()
{
int i,n,a,b;
f>>n;
for(i=0;i<n;i++)
{f>>a>>b;
while (a!=b)
  if (a>b)
   a=a-b;
  else
   b=b-a;
g<<a<<endl;
}
f.close();
g.close();
return 0;
}