#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) //while(nr2)
        {
            rest = nr1 % nr2;
            nr1 = nr2;
            nr2 = rest;
        }
        fout << nr1 << "\n";
    }
    return 0;
}