#include <iostream>
#include <fstream>

using namespace std;

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

int euclid( int a, int b)
{
    int c;
    while(b)
    {
        c = a % b;
        a = b;
        b = c;
    }
    return a;
}

int main()
{
    int a , b , nr;
    fin >> nr;
    while(nr)
    {
        fin >> a >> b;
        fout << euclid( a, b );
        fout << endl;
        nr--;
    }

    return 0;
}