#include <fstream>
using namespace std;

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

int T, a, b, r;
int main(){
    fin >> T;
    for ( int i = 1; i <= T; i++ ){
        fin >> a >> b;
        while ( b != 0 ){
            r = a%b;
            a = b;
            b = r;
        }
        fout << a << "\n";
    }
    return 0;
}