#include <iostream>
#include <fstream>

using namespace std;

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

int main(){
    int T, a, b, i, r;
    fin >> T;
    for(i = 1; i <= T; i++){
        fin >> a >> b;
        r = a % b;
        while(r){
            a = b;
            b = r;
            r = a % b;
        }
        fout << b << "\n";
    }
}