#include <fstream>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int t,a,b;
    for(fin>>t;t;--t)
    {
        fin>>a>>b;
        while(a && b)
        {
            if(a>b)
                a%=b;
            else
                b%=a;
        }
        fout<<max(a,b)<<"\n";
    }
}