#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream fin("euclid2.in");
    ofstream fout("euclid2.out");
    unsigned int t, a, b;
    fin >> t;
    for(; t; t--)
    {
        fin >> a >> b;
        while(b != 0)
        {
            unsigned int c = b;
            b = a % b;
            a = c;
        }
        fout << a << '\n';
    }
}