#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{

   int a,b,r,n,i;

   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;
}