#include <fstream>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int solve()
{
    int a, b;
    f>>a>>b;
    int r;
    while(b != 0)
    {
        r = a % b;
        a = b;
        b = r;
    }

    return a;
}

int main()
{
    int t;
    f>>t;
    while(t--)
    {
        g<<solve()<<'\n';
    }
    return 0;
}