#include <fstream>
using namespace std;

ifstream cin("euclid2.in");
ofstream cout("euclid2.out");

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