#include <fstream>

using namespace std;

int main()
{
    int n, a, b, r, i;
    ifstream fin ("euclid2.in");
    ofstream fout ("euclid2.out");

    fin >> n;
    for (i=1; i<=n; i++)
    {
        fin >> a>> b;
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout << a<< "\n";
    }
    fin.close();
    fout.close();
    return 0;
}