#include <fstream>
using namespace std;

int euclid (int&, int&);

int main ()
{
	ifstream f ("euclid2.in");
	ofstream g ("euclid2.out");
	int n, a, b;

	f >> n;
	for (int i = 0; i < n; i++)
	{
		f >> a >> b;
		g << euclid (a, b) << endl;
	}
	f.close ();
	g.close ();
}

int euclid (int& a, int& b)
{
	int c;
	while (b != 0)
	{
		c = a % b;
		a = b;
		b = c;
	}
	return a;
}