#include <fstream>

using namespace std;
ifstream fin("euclid.in");
ofstream fout("euclid.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;
}