#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{
    int a,x, y,r,i;
    fin >> a;
    for ( i = 1; i <= a; i++)
    {

        fin >> x >> y;
        while (y != 0) {
            r = x % y;
            x = y;
            y = r;
        }
        fout << x << "\n";
    }
    return 0;
}