#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int n,i,a,b;
int main()
{
  f>>n;
  for(i=1;i<=n;++i)
  {
      f>>a>>b;
      while(b)
      {
          int r=a%b;
          a=b;
          b=r;
      }
      g<<a<<'\n';
  }
  return 0;
}