#include <iostream>
#include <fstream>
using namespace std;

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

int main()
{
    int n, a, b, r;
    in >> n;
    for (int i=1;i<=n;i++)
    {
        in >> a >> b;
        while (b!=0)
        {
            r = a%b;
            a = b;
            b = r;
        }
        out << a << endl;
    }
    return 0;
}