#include <iostream>
#include <fstream>
using namespace std;

unsigned T, i, a, b, r;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    fin >> T;
    
    for(i = 1; i<=T; ++i)
    {
        fin >> a >> b;
    
        r = a%b;
        while(r)
        {
            a = b;
            b = r;
            r = a%b;
        }
    
        fout << b << '\n';
    }
    
    fin.close();
    fout.close();
    
    return 0;
}