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