#include <iostream>
#include <fstream>
#include <string>
#include <cmath>
#include <algorithm>
const int MOD=20173333;
using namespace std;


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

int main()
{
long long int t,a,b,r;
f>>t;
for(int i=1;i<=t;i++)
 {
   f>>a>>b;
r=a%b;
while(r!=0)
  {
   a=b;
   b=r;
   r=a%b;
  }
 g<<b<<endl;
 }
}