#include <fstream>

using namespace std;
int main()
{
    ifstream fin ("euclid2.in");
    ofstream fout ("euclid2.out");
    int t, a, r , b, i;
    fin >> t;
    for (i=1; i<=t; i++)
    {
        fin >> a>> b;
        while (b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout << a <<  "\n";
    }
    fin.close();
    fout.close();
    return 0;
}