#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int n, x, y, i, r;
    fin >> n;
    for(i = 1; i <= n; i++)
    {
        fin >> x >> y;
        while(y != 0)
        {
            r = x % y;
            x = y;
            y = r;
        }
        fout << x << endl;
    }
}