#include <fstream>

using namespace std;

int main()
{
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    int r,a,b,t;
    f>>t;
    for(int i=1;i<=t;i++)
    {
        f>>a;
        f>>b;
        r=a%b;
        while(r != 0)
        {
           a = b;
           b = r;
           r = a % b;
        }
        g<<b<<"\n";
    }
    f.close();
    g.close();
    return 0;
}