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



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

   int a, b,r,n,i;

   fin>>n;

   for(i=1;i<=n;i++)
   {
       fin>>a>>b;
        r=a%b;


   while(r!=0)
    {
        a=b;
        b=r;
        r=a%b;




    }

    fout<<b<<endl;;
   }






    return 0;
}