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