#include <fstream>
using namespace std;

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

int main(){
    unsigned t, a, b, i;
    fin >> t;
    for (i = 1; i <= t; i++){
        fin >> a >> b;
        while (a != b)
            if (a > b)
                a -= b;
            else
                b -= a;
        fout << a << '\n';
    }
    fin.close();
    fout.close();
    return 0;
}