# include <fstream>
using namespace std;
int main(){
    ifstream f("euclid2.in");
    ofstream f1("euclid2.out");
    int t,a,b,r,i;
    f>>t;
    for(i=1;i<=t;i++){
        f>>a;
        f>>b;
        while(b!=0){
            r=a%b;
            a=b;
            b=r;
        }
        f1<<a<<'\n';
    }
    f.close();
    f1.close();
    return 0;
}