#include <fstream>

using namespace std;

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

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