#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");

    int t, a, b;
    f >> t;

    for(int i = 1; i <= t; i++){
        f >> a >> b;

        int r = a%b;

        while(r){
            a = b;
            b = r;
            r = a%b;
        }

        g << b << '\n';
    }

    return 0;
}