#include<iostream>
#include<fstream>
using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int a, b, n, i;
int main() {
    fin >> n;
    for(i = 0; i < n; ++i) {
        fin >> a >> b;
        while(a != b) {
            if(a > b) {
                a = a - b;
            }
            else {
                b = b - a;
            }
        }
        fout << a << '\n';
    }
    fin.close();
    fout.close();
    return 0;
}