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