#include <fstream>
using namespace std;
int main()
{
	long a,b,r,t;
	ifstream f("euclid2.in");
	ofstream g("euclid2.out");
	f>>t;
	while(t--)
	{
		f>>a>>b;
		while((r=a%b))
			a=b,b=r;
		g<<b<<"\n";
	}
	return 0;
}