#include<iostream>
#include<fstream>

using namespace std;

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

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