#include <fstream>

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

int main()
{
    int nr1, nr2, rest, x;
    fin>>x;
    for(int i=1;i<=x;i++)
    {
        fin>>nr1>>nr2;
        while(nr2)
        {
            rest = nr1 % nr2;
            nr1=nr2;
            nr2=rest;
        }
        fout<<nr1<<"\n";
    }
    return 0;
}