#include <fstream>

using namespace std;

ifstream in("euclid2.in");
ofstream out("euclid2.out");
unsigned int n,a,b;
int main()
{
	in>>n;
	while(n>0){in>>a>>b;
	                               unsigned int r=0;
								   r=a%b;
								   while(r>0){a=b;
											  b=r;
											  r=a%b;}
								    out<<b<<endl;
	n--;}
    return 0;
}