# include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstrean g("euclid2.out");
int n,x,y,r,i;
int main()
{
	f>>n;
	for(i=1;i<=n;i++)
	{
		f>>x>>y;
		r=x%y;
		while(r)
		{
			x=y;
			y=r;
			r=x%y;
		}
		g<<y<<"\n";
	}
	f.close();
	g.close();
	return 0;
}