#include <fstream>

using namespace std;

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