#include<fstream>
using namespace std;
int main()
{int a,b,n,i,R;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
f>>n;
for(i=1;i<=n;i++)
   {f>>a>>b;
    while(b!=0)
	   {R=a%b;
		a=b;
		b=R;}
	g<<a<<endl;}
f.close();
g.close();
return 0;}