#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 >> b;
        while(b != 0)
        {
            int r = a % b;
            a = b;
            b = r;
        }
        fout << a << '\n';
    }
    return 0;
}