#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    int n, a, b;
    f >> n;
    for(int i=1; i<=n; i++){
        f>> a>> b;
        int r=a%b;
        while(r!=0){
            a=b;
            b=r;
            r=a%b;
        }
        g << b << endl;
        }
    return 0;
}