#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream fin ("euclid2.in");
    ofstream fout ("euclid2.out");

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