#include <fstream>

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