#include <fstream>

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

int T;
long int a, b;

int main()
{
    fin >> T;
    for (; T; --T)
    {
        fin >> a >> b;

            while (b!=0)
        {
            int r = a%b;
            a=b;
            b=r;
        }
        fout << a << endl;
    }

    return 0;
}