#include <fstream>
using namespace std;
int main()
{
    int a,b,r,n,i;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>a>>b;
        do
        {
            r=a%b;
            a=b;
            b=r;
        }while(r!=0);
        g<<a<<endl;
    }
    f.close();
    g.close();
    return 0;
}