#include <fstream>
using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");
int i,n,a,b,r;
int main()
{
f>>n;
for(i=0;i<n;i++)
{f>>a>>b;
 while(b>0)
 {
    r=a%b;
    a=b;
    b=r;
}
g<<a<<endl;
}
f.close();
g.close();
return 0;
}