#include<iostream>
#include<fstream>
using  namespace std;

int main()
{
int i,a,b,n,r;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
f>>n;
for(i=1;i<=n;++i)
{
f>>a>>b;
while(a%b)
{
r=a%b;
a=b;
b=r;
}
cout<<b<<"\n";
}
f.close();
g.close();
return 0;
}