#include <fstream>

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