#include <iostream>
#include <fstream>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int T, a, b;
    fin >> T;
    for(int i = 1; i <= T; ++i)
    {
        fin >> a ;
        fin >> b;
        int r;
        while(b != 0)
        {
            r = a % b;
            a = b;
            b = r;
        }
        fout << a << endl;
    }

    return 0;
}