#include <fstream>

using namespace std;

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

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