#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main(){
    int T,a,b,r;
    fin >> T;
    for(int i = 0; i < T; i++){
        fin >> a >> b;
        while(b!=0){
            r = a%b;
            a = b;
            b = r;
        }
        fout << a << '\n';
    }


    return 0;
}