#include <fstream>

using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int main()
{
    int n=0,a=0,b=0,r=0;
    f>>n;
    for(int i=0;i<n;i++)
        {
            f>>a>>b;
          do
        {
          r=a%b;
          a=b;
          b=r;
        }
        while (r>0);
        g<<a<<endl;
        }

    return 0;
}