#include <fstream>

ifstream fin("euclid.in")
ofstream fout("euclid.out")

using namespace std;

int main()
{
    int a, b, rest;
    int x
    fin >> x;
    for(int i = 1; 1 <=x; i++)
    {
        fin >> a >> b;
        while(b != 0)
        {
         rest = a % b;
         a = b;
         b = rest;
        }
        fout << a << "\n";
    }
    return 0;
}