#include<iostream>
#include<fstream>
using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");

int main ()
{
 int n, i, a, b, r;	
 fin >> n;
 for (i=1; i<=n; i++)
 {
    fin >> a >> b;
    while (b!=0)
    {
        r = a%b;
        a=b;
        b=r;
    } 
   fout << a << "\n";
 }
 return 0;
}