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