#include <fstream>
 
using namespace std;
 
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
 
int main() {
 
    int T, a, b, r, i;
 
    fin >> T;
 
    for (i = 1; i <= T; i++)
    {
        fin >> a >> b;
 
        while (b != 0)
        {
            r = a % b;
            a = b;
            b = r;
 
        }
        fout << a << "\n";
    }
 
    return 0;
}