#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    int T,a,b;

    fin>>T;

    while(T--)
    {
        fin>>a>>b;

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

    fin.close();
    fout.close();

    return 0;
}