#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int n,a,b,c,i;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>a>>b;
        while(b)
        {
            c = a % b;
            a = b;
            b = c;
        }
        g<<a<<"\n";
    }
    f.close();
    g.close();
    return 0;
}