#include<fstream>
using namespace std;

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