#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int t, a, b;
int main()
{
	f >> t;
	for (int i = 1; i <= t; i++)
	{
		f >> a >> b;
		while (b)
		{
			int r = a % b;
			a = b;
			b = r;
		}
		g << a << '\n';
	}
	g.close();
	f.close();
	return 0;
}