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