#include <fstream>

using namespace std;

int main()
{
    ifstream cin("euclid2.in");
    ofstream cout("euclid2.out");
    int n , a, b, r;
    cin >> n;
    for(int i = 0; i < n; i ++)
    {
        cin >> a >> b;
        while(b)
        {
            r = a % b;
            a = b;
            b = r;
        }
        cout << a << endl;
    }
    return 0;
}