#include <bits/stdc++.h>
using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");
int main()
{
    int T , x , y , r;
    fin >> T;
    for(int i = 1 ; i <= T ; i++)
    {
        fin >> x >> y;
        while(y > 0)
        {
            r = x % y;
            x = y;
            y = r;
        }
        fout << x << "\n";
    }
    fin.close();
    fout.close();
    return 0;
}