#include <iostream>
#include <fstream>

using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int main()
{
    int T, a, b;
    f >> T;
    for(int i = 0; i < T; i++)
    {
        f >> a;
        f >> b;
        while(b)
        {
            int r = a % b;
            a = b;
            b = r;
        }
        g << a << "\n";
    }

    return 0;
}