#include <fstream>

using namespace std;

int main()
{
    ifstream fin ("euclid2.in");
    ofstream fout ("euclid2.out");
    int T, a, b, r, i;
    fin>>T;
    for(i=1; i<=T; ++i)
    {
        fin>>a>>b;
        while(r!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }

        fout<<a<<" "<<endl;
    }
    return 0;
}