#include <fstream>
using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int t, a, b, r;

int main() {
    fin >> t;

    while (t-- > 0) {
        fin >> a >> b;
        
        while (b != 0) {
            r = a % b;
            a = b;
            b = r;
        }

        fout << a << endl;
    }

    return 0;
}