#include <fstream.h>
ifstream  f("euclid2.in");
ofstream g("euclid2.out");
long i,t,a,b,r;
int main ()
{f>>t;
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;}