#include <fstream>
using namespace std;
ifstream f("euclid2.in");
 ofstream g("euclid2.out");
int main()
{ int t,i,a,r,b;
f>>t;
if(t<=100000&&t>=1){
for(i=1;i<=t;i++)
{
 f>>a>>b;
 while(b!=0){
  r=a%b;
  a=b;
  b=r;}
 g<<a<<'\n';
}}
f.close();
g.close();
return 0;
}