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