#include <iostream>
#include <cstring>
#include <fstream>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

unsigned long long n,i,a,b,r;
int main()
{
  f>>n;
  for(i=1;i<=n;i++)
  {
      f>>a>>b;
      while(b)
      {
          r=a%b;
          a=b;
          b=r;
      }
      g<<a<<endl;
  }
}