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

		}
		g << a << "\n";
	}
	return 0;
}