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