#include<fstream>
using namespace std;
int main()
{int a,b,n,i;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
f>>n;
for(i=1;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;}