#include <fstream>
using namespace std;

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

int main() {
    int nr1, nr2, rest, x;
    fin >> x;
    for (int i = 1; i <= x; i++) {
        fin >> nr1 >> nr2;

        while (nr2) {
            rest = nr1 % nr2;
            nr1 = nr2;
            nr2 = rest;
        }
        fout << nr1 << "\n";
    }
}