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