#include <fstream>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

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

    fin.close();
    fout.close();
    return 0;
}