#include <fstream>

using namespace std;

int T,A,B,r;

int main(void)
{
	ifstream fin("euclid2.in");
	ofstream fout("euclid2.out");
	fin>>T;
	while (T) 
	{
		T--;
		fin>>A>>B;
		while (B)
		{
			r=A%B;
			A=B;
			B=r;
		}
		fout<<A<<"\n";
	}
	fin.close();
	fout.close();
	return 0;
}