#include <iostream>
#include<fstream>

using namespace std;

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

int main()
{
    int n, a, b, r;
    in >> n;
    for(int i = 1; i <= n; i++){
        in >> a >> b;
        while(b!=0){
            r=a%b;
            a=b;
            b=r;
        }
        out<<a<<'\n';
    }
    return 0;
}