#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<<"\n";
    fout.close();



    return 0;
}