#include <fstream>

using namespace std;
long long a,b,n,i,r;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");

int main (){

    fin>>n;
    for (i=1;i<=n;i++){
        fin>>a>>b;
        r = 0;
        while (b!=0){
            r = a%b;
            a = b;
            b = r;
        }
        fout<<a<<"\n";
    }


    return 0;
}