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

int main()
{
    ifstream fin("euclid2.in");
    ofstream fout("euclid2.out");
    int n,i,a,b,r;
    fin>>n;
    for(i=1;i<=n;i++)
    {
     fin>>a>>b;
     while(b)
     {
      r=a%b;
      a=b;
      b=r;
     }
     fout<<a<<endl;

    }
    fin.close();
    fout.close();
}