#include <fstream>
#include <iostream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int div(int a, int b)
{
    if (a == b)
        return a;
    else if (a > b)
        return div(a - b, b);
    else if (a < b)
        return div(a, b - a);
}
int main()
{
    int t, a, b;
    fin >> t;
    for (int i = 1; i <= t; ++i)
    {
        fin >> a >> b;
        fout << div(a, b)<<" \n";
    }
    return 0;
}