#include <fstream>

using namespace std;

   int a,b,aux;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");


int main()
{

    int  n,i;
    f>>n;

    for ( i=1; i<=n; i++)
    {

        f>>a>>b;


        while ( b!=0 )
        {
            aux=a % b;
            a=b;
            b=aux;
        }

        g<<a<<"\n";;
    }

    return 0;

}