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