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

int main()
{
    int a,b,r,n,i;
    ifstream fin("euclid2.in");
	ofstream fout("euclid2.out");
       fin>>n;
	for(i=1;i<=n;i++)
	{
	fin>>a;fin>>b;
    r=a%b;
    while (r!=0)
      {
           a=b;
           b=r;
           r=a%b;
      }
    if (b>=1)
      fout<<b<<endl;
	}
    return 0;
}