#include <fstream>

using namespace std;

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

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