#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int t, i, a, b, r;
int main()
{f>>t;for(i=1; i<=t; ++i){f>>a>>b;while(b){r=a%b;a=b;b=r;}g<<a<<'\n';}return 0;}