#include<fstream>


int main(void)
{
    std::ifstream ifs;
    std::ofstream ofs;

    ifs.open("euclid2.in");
    ofs.open("euclid2.out");

    int n, a, b;
    int temporar;

    ifs >> n;

    for (int contor = 1; contor <= n; contor++)
    {
        ifs >> a >> b;

        temporar = a % b;

        while(temporar)
        {
            a = b;
            b = temporar;
            temporar = a % b;
        }

        ofs << b << std::endl;

    }

    return 0;
}