#include <fstream>

using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");

int main()
{ int a,b,r,n;
f>>n;
for(int i=1; i<=n; i++){
f>>a>>b;
while(b!=0)
{
r=a%b;
a=b;
b=r;


}
g<<a<<'\n';
}

    return 0;
}