#include <iostream>
#include <fstream>

using namespace std;

int main(){
    int T, r;
    int a;
    int b;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f >> T;
    for (int i = 0; i < T; i++){
        f >> a >> b;
        r = a % b;
        while(r){
            a = b;
            b = r;
            r = a % b;
        }
        g << b << "\n";
    }


    return 0;
}