#include <fstream>
using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");

int main ()

{
    int t, a, b, r;
    fin >> t;

    for (int 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;
}