#include <fstream>

using namespace std;

ifstream in("euclid2.in");
ofstream out("euclid2.out");

int main()
{
    int x;
    int a, b, rest;
    in>>x;
    for (int i = 1; i <= x; i++)
    {
        in >> a >> b;
        while(b)
        {
            rest = a % b;
            a = b;
            b = rest;
        }

        out<< a << "\n";
    }
    return 0;
}